About the Role:

Focus area: OpenSearch and ElasticSearch

What You'll Do:

• Maintain a deep understanding of the data components - including Cassandra, ElasticSearch/OpenSearch, Kafka, Zookeeper, MySQL and PostgreSQL, Redis, Valkey, Memcache, Pulsar, SQS and use that understanding to operate and automate properly configured clusters.

• Understanding of operating databases in kubernetes and managing container images.

• Develop infrastructure services to support the CrowdStrike engineering team's pursuit of a full devops model.

• Work closely with Engineering and Customer Support to troubleshoot time-sensitive production issues, regardless of when they happen.

• Keep petabytes of critical business data safe, secure, and available.

What You'll Need:

• Configuration management (Chef)

• Scripting in Python and bash

• Experience with large scale datastores using technologies like Cassandra, ElasticSearch/Opensearch, Kafka, Zookeeper,MySQL, PostgreSQL, Redis, Valkey, Memcache, Pulsar, SQS

• Experience with large-scale, business-critical Linux environments

• Experience operating within the cloud, preferably Amazon Web Services, GCP and OCI

• Proven ability to work effectively with both local and remote teams

• Track record of making great decisions, particularly when it matters most

• Excellent communication skills, both verbal and written

• A combination of confidence and independence with the prudence to know when to ask for help from the rest of the team

• Bachelor's degree in an applicable field, such as CS, CIS or Engineering

Hedera Hashgraph is looking to hire a Security Operations Analyst to join their team. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

MongoDB is hiring a remote Senior Software Engineer – SQL Engine. This is a full-time position that can be done remotely anywhere in the United States.

MongoDB - The database for modern applications.

Are you looking for a position where you can work from home, learn new skills, apply those skills, work hard, and have the potential to make upwards of six figures? If so this might the job for you! We are looking to hire an enthusiastic and hardworking junior recruiter to assist with our recruiting activities. As a junior recruiter, you will be responsible for posting job descriptions online, reviewing resumes, screening potential candidates, and setting up interviews. You will work directly under the recruiting manager or senior recruiter and assist with all recruiting-related duties. To ensure success as a junior recruiter, you should have knowledge of recruitment techniques, excellent communication skills, and the ability to multi-task. The ability to learn quickly and apply that knowledge, as well as being organized is critical. Interest or experience/knowledge of information technology (software development, systems administration, information security) is also a needed attribute. Salary range: Base (35K-50K) plus Commission (Unlimited) Junior Recruiter Responsibilities: Assisting the manager or senior recruiter with recruitment duties. Reviewing available positions and candidate requirements. Communicating with the HR team. Posting job descriptions on social media and job sites. Tracking open positions using recruiting software. Screening candidate resumes. Contacting candidate references and verifying education requirements. Conducting initial phone screenings. Conducting interviews with candidates. Communicating with candidates and setting up interviews with hiring managers and technical managers. Managing the applicant tracking system. Junior Recruiter Requirements: Bachelor's degree in human resources, business, communications or similar field. Previous experience working as a junior recruiter is a plus. Knowledge of recruitment software and database systems is a plus. Advanced experience with Microsoft Office suite and other applicable software applications (Outlook, Word, Excel, PowerPoint, Adobe PDF). Attention to detail. Excellent verbal and written communication skills. Advanced interpersonal skills. Critical thinking skills. Ability to work off hours. Ability to conduct interviews over the phone. Excellent decision-making skills. Good organizational skills.

Coinbase is looking to hire a Software Engineer, Emerging Talent (Canada) to join their team. This is a full-time position that can be done remotely anywhere in Canada.

Parity Technologies is looking to hire a Software Engineer - Proof of Personhood to join their team. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Khan Academy is hiring a remote AI Engineer (12 months or 18 months fixed-term). This is a full-time contract position that can be done remotely anywhere in the United States.

Khan Academy - You can learn anything. For free. For everyone. Forever..

Software Engineer - UI Developer - 20+ yrs of Experience - PARTAIL REMORE - TS/SCI w/Poly Required Halogen Engineering Group is looking for a Software Engineer that is an experienced UI Developer. Location: Columbia, MD Travel Required: No Shift: Day Remote Type: Onsite Security Clearance: Current TS/SCI Polygraph: Required Salary Range The projected compensation range for this position is 241K to 289K (annualized USD). Salary is determined by various factors, including but not limited to location, the inidual's particular combination of education, knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements. Requirements Analyze user requirements to derive software design and performance requirements Debug existing software and correct defects Provide recommendations for improving documentation and software development process standard Design and code new software or modify existing software to add new features Integrate existing software into new or modified system or operating environment Develop simple data queries for existing or proposed databases or data repositories Write or review software and system documentation Serve as team lead at the level appropriate to the software development process being used on any particular project Capabilities • Analyze user requirements to derive software design and performance requirements • Debug existing software and correct defects • Provide recommendations for improving documentation and software development process standard • Design and code new software or modify existing software to add new features • Integrate existing software into new or modified system or operating environment • Develop simple data queries for existing or proposed databases or data repositories • Write or review software and system documentation • Serve as team lead at the level appropriate to the software development process being used on any particular project • Design or implement complex database or data repository interfaces/queries • Develop or implement algorithms to meet or exceed system performance and functional standards • Assist with developing and executing test procedures for software component • Develop software solutions by analyzing system performance standards, confer with users or system engineers; analyze systems flow, data usage and work processes; and investigate problem areas • Modify existing software to correct errors, to adapt to new hardware, or to improve its performance • Design, develop and modify software systems, using scientific analysis and mathematical models to predict and measure outcomes and consequences of design • Design or implement complex algorithms requiring adherence to strict timing, system resource, or interface constraints; Perform quality control on team products • Implement recommendations for improving documentation and software development process standards • Oversee one or more software development teams and ensure the work is completed in accordance with the constraint of the software development process being used on any particular project • Confer with system engineers and hardware engineers to derive software requirements and to obtain information on project limitations and capabilities, performance requirements and interfaces • Coordinate software system installation and monitor equipment functioning to ensure operational specifications are met • Recommend new technologies and processes for complex software projects • Serve as the technical lead of multiple software development teams • Select the software development process in coordination with the customer and system engineering • Ensure quality control of all developed and modified software • Delegate programming and testing responsibilities to one or more team and monitor their performance Qualifications A Bachelor's degree in computer science or related discipline from an accredited college or university, plus twenty (20) years of experience as a SWE, in programs and contracts of similar scope, type, and complexity OR

Software Engineer- Javascript Frameworks - FS Poly Required - 7+ yrs of Experience (Partial Telework) Halogen Engineering is looking for a Software Engineer who has skills and technical experience with Javascript frameworks. Location: Annapolis Junction, MD/Hybrid Travel Required: No Shift: Day Remote Type: Hybrid (Up to 16 hours of telework per week, however telework hours will depend on tasking) Security Clearance: Current TS/SCI Polygraph: Required Salary Range The projected compensation range for this position is 172K to 206K (annualized USD). Salary is determined by various factors, including but not limited to location, the inidual's particular combination of education, knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements. Required Skills Developing applications using AngularJS / React / Vue (other JS frameworks)

About ZetaChain

We’re building something ambitious at ZetaChain: the first universal blockchain that connects everything—Bitcoin, Ethereum, every chain. We’re backed by top investors, live on mainnet, and building the future of blockchain technology. If you’re excited about working on big, meaningful problems with a world-class team, you’re in the right place.

We are seeking an experienced and dedicated Senior Blockchain Security Engineer to join our Security team and play a crucial role in safeguarding the ZetaChain ecosystem.

Why You Want To Work Here

• Impactful Role: Play a pivotal role in shaping the future of a leading blockchain protocol.
• Remote Flexibility: Enjoy the freedom and flexibility of a remote work environment, ensuring a work-life balance with quarterly team meet ups to get to know each other in person.
• Cutting-Edge Technology: Dive deep into the latest advancements in blockchain technology with ZetaChain’s innovative protocol.
• Continuous Learning: Stay updated with the rapidly evolving blockchain landscape, ensuring you’re always at the forefront of the industry.
• Commitment to Open Source: We are committed to supporting open source software and use high quality open source tools internally when possible.

Find out more about our high performance culture.

Job Description

This role is focused on securing the broader ZetaChain ecosystem by working hands-on with independent third-party developer teams — from early-stage grant recipients to established partners — to help them build and maintain secure blockchain applications. These teams are critical to our ecosystem’s growth.

The ideal candidate has a strong background in product security, TypeScript/JavaScript/React programming, and Web3 development, along with deep knowledge of wallet security, dApp threat modeling, and account abstraction (EIP-4337). You should be comfortable acting as both a technical expert and a trusted partner to external teams.

Responsibilities

• Work directly with external ecosystem developers to advise on smart contract, dApp, and wallet security best practices throughout the development lifecycle
• Collaborate with internal and external teams to identify high-risk code changes in both React/TypeScript frontends and smart contracts, participating in security-focused code reviews
• Develop and implement innovative security testing methodologies specific to blockchain and DeFi environments
• Analyze new and emerging dApp and wallet attack vectors (phishing, session hijacking, malicious npm packages, RPC manipulation) and assess their potential impact on the ZetaChain ecosystem
• Lead or coordinate security audits and penetration tests for ecosystem projects, and drive timely remediation of findings
• Contribute to and help manage the bug bounty programs by validating and triaging reported vulnerabilities
• Create and maintain security guidelines, best practices, and documentation tailored for ecosystem developers

Requirements

• Location:
  • Hybrid in San Francisco is preferred (2-3 days a week)
  • Open to fully remote for exceptional candidates that align with US Timezones
• 3+ years of experience in cybersecurity, with a focus on blockchain and Web3 technologies
• 2+ years of software development experience working with smart contracts (Ideally Solidity)
• Experience with security tools and techniques specific to blockchain environments
• Deep familiarity with common attack vectors in Web3, such as flash loan attacks, reentrancy, and oracle manipulation
• Strong understanding of Wallet security (EIP-712, SIWE etc), account abstraction (EIP-4337), smart contract vulnerabilities and DeFi-specific risks
• Familiarity with tools and frameworks like Foundry, Slither, Tenderly, Wagmi, viem, RainbowKit
• Strong analytical and problem-solving skills with attention to detail
• Excellent communication skills and ability to explain complex security concepts to both technical and non-technical audiences

Preferred Qualifications

• Experience with Ethereum, Ton, Solana, SUI, and other major blockchain protocols
• Previous experience auditing code (Solidity, React, Typescript, Rust, Func, etc)
• Contributions to open-source blockchain security tools or research
• Active participation in bug bounty programs or capture-the-flag (CTF) competitions
• Experience implementing and managing automated security testing pipelines
• Familiarity with formal verification techniques for smart contracts
• Understanding of zero-knowledge proofs and their blockchain applications

In-Office Culture

This is a remote position but we will prioritize applicants based in the Bay Area. Many members of our team work hybrid from our San Francisco office, and we aim for 2 to 3 in-office days per week. We know life happens, whether it’s travel, appointments, or family needs and we’re flexible when the schedule needs to shift. The company is a mix of fully remote and hybrid team members.

Compensation

Base Salary: $150,000 – $200,000 (San Francisco benchmark)

In addition to the base salary, all full-time team members receive an additional 10% to 25% in liquid benefits with upside based on role, experience, and impact. We believe in building together and sharing in the long-term success of the network. Compensation packages are designed to be competitive and aligned with the growth of both the team and the ecosystem.

Let’s build the first Universal Blockchain together.

TO BE CONSIDERED FOR THIS ROLE, PLEASE SUBMIT AN UPDATED RESUME TRANSLATED TO ENGLISH

Who is Housecall Pro?  

Housecall Pro is a fintech company founded in 2013. We built a SaaS platform that helps Home Service Professionals operate their businesses. We created the application for plumbers, electricians, and other Pros in the home improvement/trades industries.

Housecall Pro is a simple, cloud-based field service management software platform aimed at helping companies keep track of jobs, monitor technician activity, and produce invoices easily.

Our core product helps our clients with scheduling, dispatching, job management, invoicing, payment processing, marketing, and more. They used to struggle with the ton of paperwork after their hours. Now they can save time, and manage their business in one app.

We support more than 27,000 businesses and have over 1,300 ambitious, mission-driven employees in San Diego, Denver, and all over the world (including 200+ talented and innovative Engineers).

🤜🤛  WHAT’S IN IT FOR YOU?:

• 💻🌎Remote environment totally built to make you feel that we are all together in one space without leaving your home office!
• 😎🏝Self Managed PTO - Beach? Mountains? Camping? Discovering new experiences? You are free to take time out as you need!
• ⏰Flexible work hours - We believe that you can reach your professional and personal goals working with us and encourage you to have a work life balance!
• A culture built on innovation that values big ideas - We are always open to new ideas that will improve the life of our Pros!
• Work in your own time zone - Because we don’t think that you should miss those memorable moments with your friends and family!
• Newest MacBook (or PC if you prefer!) + Setup Fee ($500) - What is an engineer without the right tools right? Here in HCP, you can choose your computer and  set up your home office!

We know what you are thinking…WHAT IS THE ROLE AND WHAT WILL YOU BE DOING? 👀

As a Senior Staff Software Engineer, you are a critical inidual contributor and architectural leader within our engineering organization. You drive the long-term technical vision of our platform, guiding how we design, build, and evolve scalable, reliable systems across multiple squads. As a high-impact, high-autonomy technical leader, you combine deep technical contributions with influential cross-team collaboration, helping shape the future of our platform to better serve our customers.

You serve as a trusted technical partner to Engineering Managers, Directors, and Product leadership, taking ownership of our most complex technical challenges while mentoring engineers across the organization. You play a pivotal role in our transition from a monolithic Ruby on Rails application toward a modern, distributed, event-driven, domain-oriented architecture.

Our team is passionate, empathetic, hard working, and above all else focused on improving the lives of our service professionals (our Pros). Our success is their success.

In your daily routine, you will: 

• Lead cross-squad architecture efforts, shaping and evolving technical direction across multiple domains
• Design and build scalable, fault-tolerant systems to ensure outstanding performance and reliability as our customer base grows
• Champion Domain-Driven Design (DDD) practices and empower teams to structure software around clear, maintainable domain boundaries
• Advocate for and guide the adoption of event-driven system design using tools such as Kafka and SQS
• Educate and mentor engineers on architecture principles, design patterns, and best practices across the engineering organization
• Identify and drive the resolution of technical bottlenecks and hotspots through refactoring and re-architecture efforts
• Uphold and advance engineering excellence in areas such as performance optimization, secure coding, test automation, and CI/CD health
• Conduct deep technical reviews of codebases and architectural designs to ensure long-term maintainability and scalability
• Collaborate cross-functionally with Product, Design, and Site Reliability Engineering (SRE) teams to align technical solutions with business needs
• Model a culture of ownership, accountability, and technical excellence across squads

• Help engineers leverage AI to boost productivity and solve complex product challenges through hands-on guidance and enablement.

🏆 You must be aware that joining Housecall Pro means: 

• Building a product that really improves users’ lives (70k users, 4.6 rates at App Store) - let’s see what clients say about the product;
• Being a part of a global team that build a erse culture in our company
• Working with more than 200 engineers highly qualified and engaged in improving the life of our Pros. 
• Having a real impact on technical decisions without breaking through the corporate, glass ceiling;
• Being in direct contact with the community of users, who are eager to share their feedback;
• Rapidly growing teams that create a defined career path.

We think that this offer is for you if you have:

• ✅9+ years of experience designing, building, and operating complex production systems
• ✅ Deep experience in Ruby/RoR
• ✅Proficiency in multiple programming languages (i.e. JavaScript, Python, Go, Java, Node.js)
• ✅Deep expertise with cloud platforms (i.e. AWS), containerization, and serverless/cloud-native architectures
• ✅Proven success applying Domain-Driven Design (DDD) principles across multiple teams or domains
• ✅Experience architecting and building event-driven systems using distributed messaging tools (i.e. Kafka, SQS)
• ✅Experience with defining and improving CI/CD pipelines (e.g., Jenkins, Gitlab, etc) and automated testing strategies (e.g., e2e, canary tests, integration tests, etc)
• ✅Expertise in scalable API design and management (i.e. RESTful APIs; GraphQL is a plus)
• ✅Strong background in system observability practices (logs, metrics, tracing) and performance diagnostics
• ✅Bachelor’s degree in Computer Science, Engineering, or related field, or equivalent work experience

🔝And also, you get extra points for:

• ✔  Strong systems thinking with an ability to simplify complex problems
• ✔  Comfort working through ambiguity and making well-reasoned decisions with incomplete information
• ✔  Collaborative nature with a proactive approach to communicating technical trade-offs
• ✔  Deep empathy for the end-user and a commitment to building solutions that deliver real value
• ✔  Ownership mentality with a balance of urgency and long-term system health
• ✔  Curiosity and passion for staying current on evolving architecture patterns and best practices
• ✔ Demonstrate a strong passion for using AI technologies to enhance productivity, quality, and innovation
• ✔ Curiosity and drive to stay ahead of emerging AI/ML technologies and their practical applications

Okay, okay, you need something to pay the bills, right? 🤑

Our range of compensation starts at: 💵8000 USD dollars.💵

Come and join us in HCP!

Founded in 2013, Housecall Pro helps home service professionals (Pros) streamline every aspect of their business. With easy-to-use tools for scheduling, dispatching, payments, and more, Housecall Pro enables Pros to save time, grow profitably, and provide best-in-class service.

Housecall Pro’s brand portfolio includes Business Coaching by Housecall Pro, a business coaching solution for home services businesses. Our brands are united by a singular mission to champion our Pros to success.

We support more than 40,000 businesses and have over 1,800 ambitious, mission-driven, genuinely fun-loving teammates across the globe. If you want to do work that impacts real people, supported by a team that will invest in you every step of the way, we’d love to hear from you

Housecall Pro celebrates ersity and we are committed to creating an inclusive environment.  We are an equal opportunity employer and do not discriminate on the basis of gender, race, religion, national origin, ethnicity, disability, gender identity/expression, sexual orientation, veteran or military status, or any other category protected under the law.

Salary and compensation

Benefits

🌎 Distributed team

🏖 Unlimited vacation

🏖 Paid time off

🖥 Home office budget

💰 Equity compensation

"

About Novoflow

At Novoflow, we’re modernizing the entire healthcare market by deploying computer agents that automate any front or back-office task.

We’ve already secured multi-year contracts and strong investor backing from YC advisors and top-tier investors. Now we’re scaling fast to meet skyrocketing demand.

Why Join Us?

* Impact: Ship code that hits production fast and is used by real customers within days.

About the Role

We’re seeking a Forward Deployed Engineer who thrives at the intersection of engineering, problem-solving, and customer success.

If you’re as comfortable coding as you are hopping on a call with a clinic to troubleshoot an integration live, this role is for you.

What You’ll Do:

* Deploy & Integrate: Work closely with clinics to integrate Novoflow’s AI agents into their workflows, especially across messy, legacy EHR systems.

Who You Are / Must-Haves:

* Startup Mindset: Prior startup experience strongly preferred; former founders welcome.

Perks & Benefits

* Competitive base salary + equity

Interview Process

* Intro call with CTO (20 min)

",

Cloak is seeking a highly skilled and motivated Aztec Developer to join our fully remote engineering team. As a key contributor, you will play a crucial role in building cutting-edge privacy-preserving solutions using the Aztec protocol. We are a forward-thinking company focused on delivering secure, confidential, and scalable decentralized applications within the Ethereum ecosystem.

Salary and compensation

Benefits

🌎 Distributed team

⏰ Async

🏖 Unlimited vacation

🥧 Pay in crypto

🥸 Pseudonymous

🎅 We hire old (and young)

Type: Full-time in-person Sydney (AU); or, remote Bay Area (US) – office opening soon

Experience: 5+ years, Senior+/Principal/Architect

Compensation: Competitive equity/token + salary

About wh-ai

wh-ai is building the future of knowledge, enabling collaboration of both experts and AI. Our revolutionary platform implements a peer-to-peer dialectic process on a decentralized trustless network where questions are answered and verified by the fittest and most advanced AI agents. We enable a future where we can thrive in novel and abundant organic and synthetic data, expertly verified, with immutable primitives that empower the next discovery on a solid bedrock.

We’ve just closed our first financing round (backed by some super Angels and VCs) and we’re building our strike founding team to launch the public Beta and accelerate core development. Joining now is an opportunity to make an impact in days not years, creating exponential value in the community and equity/token.

The Role

We’re seeking a (Senior+/Principal/Architect) ML/Game Theory Engineer to co-lead the technical development of our AI-powered verification platform, working side-by-side with our Full-Stack AI/Blockchain Platform Lead. This is a high-impact role for a technically exceptional inidual who thrives at the intersection of advanced machine learning, game theory, and agentic system design. You will architect and implement the fine-tuning strategies for our core AI agents—Intelligence Service Providers (ISP) and Intelligence Verification Service Providers (IVSP)—that underpin trustless information verification and decentralized knowledge creation.

Your work will directly shape the mechanisms that ensure outputs are not just intelligent, but correct, comprehensible, and aligned with customer interests, leveraging the latest in LLM training, distillation, and evaluation frameworks. You will help design the incentive, verification, and equilibrium mechanisms that allow erse AI and human agents to compete and cooperate in a robust, game-theoretic ecosystem.

What You’ll Do

ML/AI Agent Engineering

• Lead the design and implementation of fine-tuning, distillation, and evaluation pipelines for LLM-based ISP and IVSP agents, optimizing for accuracy, explicability, and alignment in a multi-agent, trustless environment.
• Integrate advanced frameworks for claim extraction, fact-checking, and output verifiability, ensuring that agent outputs are both entailed by source data and understandable in isolation.
• Develop reinforcement learning and multi-turn agent strategies to improve agent performance in adversarial and cooperative settings, drawing on the latest research in agentic deployments and multi-agent learning.
• Architect systems that manage and mitigate negative-value information feedback loops, ensuring the positive value bias of information networks and preventing runaway dynamics.

Game Theory & Mechanism Design

• Apply game-theoretic models to design incentive structures, competition protocols, and equilibrium strategies for decentralized agent networks, including Nash equilibrium analysis and coalition resistance.
• Design trustless verification and reward mechanisms that make verification easier and more robust than answer generation, leveraging concepts from mechanism design, repeated games, and evolutionary dynamics.
• Model and simulate strategic agent interactions (AI and human) to optimize for system-wide alignment, ersity of agent types, and minimization of agency costs.

System Integration

• Collaborate with the Full-Stack/Blockchain Platform Lead to integrate ML/game-theoretic components into the broader distributed verification, reward, and knowledge management architecture.
• Contribute to the design of the protocol’s core primitives: atomic chain-of-thought reasoning, verifiable step decomposition, and secure agent identity and reputation systems.

What You Bring

Required Technical Skills

• 2+ years hands-on experience in ML/AI, with deep expertise in LLM training, fine-tuning, distillation, and evaluation (OpenAI, Anthropic, Llama, etc.).
• Strong background in multi-agent systems, game theory, or mechanism design, with demonstrable experience designing or analyzing agentic interactions in adversarial or cooperative settings.
• Proficiency with ML frameworks (PyTorch, JAX, TensorFlow), agentic orchestration (LangChain, Haystack, or similar), and distributed training pipelines.
• Experience implementing or integrating claim extraction and fact-checking frameworks (e.g., Claimify), including decomposition of outputs into verifiable atomic claims.
• Familiarity with blockchain/crypto incentive systems, peer-to-peer protocols, or trustless verification architectures.

Preferred Experience

• Publication record or open-source contributions in multi-agent reinforcement learning, game-theoretic AI, or decentralized ML systems.
• Experience with reinforcement learning from human feedback (RLHF), agentic evaluation protocols (e.g., Chatbot Arena, Scale AI), or consensus mechanisms.
• Familiarity with large-scale knowledge graphs, knowledge management, or cryptographic verification of information provenance.

Soft Skills

• Startup mentality—comfortable with rapid iteration, ambiguity, and high ownership.
• Collaborative leadership—able to co-drive architectural decisions and cross-functional integration.
• Communication—can explain complex technical concepts to erse audiences, including non-technical stakeholders.
• Problem-solving—adept at debugging, optimizing, and scaling complex distributed agent systems.

Type: Full-time in-person Sydney (AU); or, remote Bay Area (US) – office opening soon

Experience: 7+ years, Senior+/Principal/Architect

Compensation: Competitive equity/token + salary

About wh-ai

wh-ai is building the future of knowledge, enabling collaboration of both experts and AI. Our revolutionary platform implements a peer-to-peer dialectic process on a decentralized trustless network where questions are answered and verified by the fittest and most advanced AI agents. We enable a future where we can thrive in novel and abundant organic and synthetic data, expertly verified, with immutable primitives that empower the next discovery on a solid bedrock.

We’ve just closed our first financing round (backed by some super Angels and VCs) and we’re building our strike founding team to launch the public Beta and accelerate core development. Joining now is an opportunity to make an impact in days not years, creating exponential value in the community and equity/token.

The Role

We’re seeking a (Senior+/Principal/Architect) Full-Stack Engineer to lead technical development of our AI-powered verification platform. This is a high-impact role perfect for someone who thrives in a fast-paced startup environment and wants to shape the future of expert + AI verification systems.

As our technical lead, you’ll own the entire stack and shape the team - from React frontend to Node.js backend, AI integrations, and upcoming blockchain Layer 2 implementation. You’ll architect scalable solutions, integrate cutting-edge AI models, and prepare our platform for decentralized blockchain deployment.

What You’ll Do

Technical Leadership

• Lead full-stack development of our React/TypeScript frontend and Node.js/Express backend
• Architect and implement AI integrations using our API and Model Context Protocol (MCP) system supporting OpenAI, Anthropic, Gemini, DeepSeek and other top models.
• Design blockchain Layer 2 integration for decentralized verification and reward distribution
• Optimize performance of our distributed verification network with real-time WebSocket communication
• Implement advanced testing strategies including parallel test execution and comprehensive CI/CD pipelines

AI/ML Integration

• Enhance our autonomous bot system that automatically processes questions and verifications using LLMs
• Develop hybrid human-AI workflows with quality control thresholds and human oversight
• Build AI-powered verification assistance tools for human verifiers

Blockchain Development

• Architect and develop a decentralized solution for integration of tokens, incentives and rewards across L1 and L2.
• Token design
• Implement Proof of Personhood (PoP) verification systems
• Build bridges between traditional web infrastructure and blockchain networks

System Architecture

• Scale our PostgreSQL database with advanced query optimization and connection pooling
• Enhance our real-time communication systems with WebSocket reliability and performance
• Implement advanced security measures including rate limiting, authentication, and data protection
• Design microservices architecture for horizontal scaling

What You Bring

Required Technical Skills

• 5+ years full-stack development with modern JavaScript/TypeScript ecosystems, and Go or Rust or C/C++ for high performance node development.
• Expert-level React/TypeScript with advanced state management (TanStack Query preferred)
• Strong Node.js/Express backend development with real-time systems experience
• Database expertise with PostgreSQL or MySQL, complex queries, and ORM frameworks (Drizzle preferred)
• AI/ML integration experience with OpenAI, Anthropic, or similar LLM providers
• Blockchain development with Solidity, EVM, Ethereum Layer 2 solutions (Polygon, Arbitrum, or Optimism)
• DevOps and CI/CD experience with GitHub Actions, testing frameworks, and deployment pipelines

Preferred Experience

• Open-source project experience
• WebSocket and real-time systems development
• Distributed systems architecture and scaling
• Test-driven development with Jest, React Testing Library, and parallel test execution
• Payment integration with Stripe or similar platforms
• Security best practices for authentication, session management, and data protection
• Performance optimization for both frontend and backend systems
• Layer 2 deployment experience on Base, Arbitrum, or Optimism
• EigenLayer AVS development or validator operation experience
• ZK proof systems and cryptographic verification mechanisms

Soft Skills

• Startup mentality - comfortable with rapid iteration and changing requirements
• Technical leadership - ability to make architectural decisions and guide technical direction
• Problem-solving - skilled at debugging complex distributed systems
• Communication - can explain technical concepts to non-technical stakeholders
• Ownership mindset - takes full responsibility for feature delivery and system reliability

Job Description Software Engineer - Back End - 20+ yrs of Experience (PARTIAL TELEWORK) - TS/SCI w/Poly clearance is required Halogen Engineering Group is looking for a Software Engineer with back end experience. Location: Annapolis Junction, MD/Hybrid Travel Required: No

Medical Plans Three available medical plans-2 Platinum PPO Plans ($0 Deductible) and 1 HSA Plan ($1500 deductible)

Aragon is a team of 24 people that spans a broad range of backgrounds, interests, and geographies. We’re entrepreneurs, technologists and skeptics, troublemakers and problem solvers, who are building unstoppable tooling for the creation and management of Onchain Organizations. Our mission is to enable any organization to experiment with governance at the speed of software and we envision a world where humans can coordinate by the rule of code, reducing the need for enforcement by trusted systems, often through the use of violence.

Aragon launched the first DAO framework in 2017, securing over $40 billion in assets for the likes of Lido and Curve. We are currently building Aragon OSx & App, a new and improved tech-stack supporting projects such as Polygon and Taiko.

As a Smart Contract Developer at Aragon, you will be joining the solutions team, where you’ll be directly involved in designing and building custom integrations for clients on top of the Aragon OSx protocol.

💪 What do we expect from the Smart Contract Developer?

• Transform client needs into technical designs and production-ready code, always considering the user.
• Lead projects from inception to live maintenance, emphasizing secure and high-quality delivery at every phase.
• Exhibit deep expertise in Solidity, having not just deployed smart contracts but designed intricate contract architectures addressing real-world business challenges.
• Have an understanding of Decentralized Finance (DeFi) and the workings of major DeFi protocols. Foster enthusiastic collaboration with other product and engineering squads, further deepening everyone’s knowledge of the ever-expanding technologies of web3.
• Engage in daily stand-ups, knowing when your expertise is critical, and step up to proactively solve your teammate’s challenges.
• Build solutions with a strong grasp of software architecture best practices and common standards across the Ethereum ecosystem and in the Decentralized Finance space.

⚠️ Minimum requisites

• 3+ years delivering software to real users, ideally in a fast-paced startup environment
• Expert-level Solidity experience, including the design and optimization of advanced smart contract systems
• Strong foundation in smart contract security, with a history of successful audits and knowledge of common vulnerabilities
• Strong working proficiency in foundry and hardhat
• Familiarity with or contributions to Ethereum EIPs
• Significant technical contributions to DeFi protocols with at least 8 figures in TVL
• Fluency in typescript, and popular libraries such as Ethers (v5, v6) and viem.
• Experience working across multiple EVM networks - sidechains, OP rollups and Zk rollups
• Proven contributions to open-source projects within blockchain, cryptography, decentralized systems, or the broader web3 ecosystem
• Understanding of how to work in an agile environment, using git, and tools like Linear and Github
• Passionate about the possibilities of decentralized autonomous organizations and the impacts they may have on how humans work together to solve problems
• Excellent English and technical communication - both written and oral
• You are able to attend quarterly offsites - usually located in or around Europe - to work in person with your team

💡 Bonus skills

• Experience or certification in formal verification of smart contracts
• Knowledge or hands on experience working with other parts of our stack, like NextJS, Turborepo, Envio, IPFS
• Interest in the use of LLMs to enhance developer productivity
• Working knowledge of advanced security tools such as HEVM, Slither, Echidna, foundry Invariant tests.
• Demonstrated experience using Vyper, Go or Rust
• Proven mentoring skills, fostering a culture of growth and learning within teams
• Power user of DeFi and/or Web3 applications

We value freedom and responsibility among our contributors. In practice, this means that we’re a remotely distributed organization that’s flexible but pragmatic. The team gets together for quarterly in-person offsites where we strengthen our alignment, drive projects forward, and have fun in different locations across Europe. We will trust you to accommodate and support your team, and communicate if you ever feel stretched thin. You will get all of the resources needed to be effective, whether it’s for setting up your remote work environment or a personal development budget. You will be a part-owner of Aragon X and you are expected to work with this mentality.

This role reports to Aragon X, a Swiss AG dedicated to advancing the Aragon Project. We are an Equal Opportunity Employer supporting a community of DAO creators, developers, and users experimenting with new forms of social coordination and governance.

About the role:

Injective is seeking a Security Engineer to help strengthen and future-proof the security of our blockchain ecosystem and core infrastructure. This role blends hands-on security engineering with proactive research — you’ll identify and mitigate vulnerabilities, run offensive security campaigns, and help shape Injective’s reputation as one of the most secure ecosystems in Web3.

Responsibilities:

• Perform regular security reviews, penetration tests, and code audits across our chain modules, smart contracts, validator infrastructure, and supporting services.
• Hunt for new vulnerabilities through fuzzing, adversarial testing, and exploit development — at the protocol, network, and application layers.
• Develop internal tools to detect misconfigurations, suspicious activity, and chain-level edge-case exploits.
• Analyze emerging threats in other blockchains, rollups, bridges, or validator networks — assess Injective’s exposure, propose mitigations, and publish findings internally.
• Manage vulnerability scanning pipelines, patch management, and incident response processes.
• Audit internal systems and services (cloud accounts, access control, VPN, GitHub, secrets, endpoints, MDM, etc.) for best practice alignment
• Collaborate with core developers, validators, and external auditors to test, validate, and deploy security fixes.
• Contribute to our bug bounty program and coordinate with the security research community for responsible disclosure.
• Help define and enforce internal security policies, tooling, and education to raise baseline awareness

Who You Are

• 5+ years of experience in security engineering, offensive security, or protocol-level system audits
• Strong experience in security engineering for cloud-native or blockchain-based systems.
• Solid understanding of offensive security: vulnerability discovery, fuzzing, static/dynamic analysis.
• Strong pen-testing experience
• Experience working with or auditing blockchain protocols, validator setups, or smart contracts
• Hands-on experience securing distributed infrastructure (Linux, containers, Kubernetes, cloud networks).
• Familiarity with blockchain architectures (Cosmos SDK, Tendermint, IBC, EVM, CosmWasm, or cross-chain bridges).
• Proficiency in Go or Rust (protocols) is a must.
• Experience with Solidity/CosmWasm (smart contracts) is a plus
• Comfortable writing PoCs, threat models, or simple fuzzers to validate real-world risk.
• Self-driven, curious, and motivated to think like an attacker and design like a defender.

Bonus Points:

• Experience with Cosmos SDK, IBC, or Injective chain tooling
• Involvement in open-source security research, bug bounties, or CTFs

Why Work With Us:

• Work on high-impact security challenges at the forefront of decentralized finance
• Collaborate with a global team of protocol engineers, devops engineers, and Web3 pioneers
• Competitive compensation, generous token incentives, and flexible remote work

We need a Senior Backend Engineer with a strong focus on Go who can architect scalable systems, ship production-ready code, and own the entire deployment pipeline — from local development to cloud infrastructure. 

What You'll Do

• Design and implement high-performance backend services in Go

• Build and maintain cloud infrastructure across AWS, GCP, and Azure

• Own the DevOps pipeline — from CI/CD to monitoring and alerting

• Lead our SOC 2 compliance efforts, implementing security best practices

• Create robust APIs that power our AI-driven supply chain platform

• Optimize for performance, reliability, and cost across cloud providers

• Automate infrastructure provisioning and deployment processes

• Collaborate with frontend engineers to design efficient data flows

• Make architectural decisions that balance speed of delivery with long-term maintainability

You Should Have

• 5-10 years of backend development experience

• Strong Go programming skills (minimum 2+ years preferred)

• Proven experience with AWS, GCP, and Azure — not just one cloud provider

• Deep understanding of cloud-native architectures and microservices

• Hands-on DevOps experience (Docker, Kubernetes, Pulumi, etc.)

• Security-first mindset with understanding of compliance frameworks

• Self-driven approach with ability to own projects end-to-end

• Experience shipping production systems that scale

Bonus Points

• SOC 2 compliance experience — you've been through the audit process

• Built AI/ML infrastructure or data pipelines at scale

• Experience with multi-cloud deployments and cost optimization

• Track record of improving developer velocity through tooling and automation

• Background in supply chain, logistics, or enterprise software

Why Join Us?

• You'll have direct impact — this isn't a cog-in-the-machine role

• Own the entire backend architecture and infrastructure decisions

• Work with a lean team where your decisions shape the product and culture

• Build fast, experiment often, and learn from real users

• High ownership with the flexibility to work where and when you're most productive

• Join early, grow with the company, and help define engineering excellence

To Apply

Tell us about a backend system you built that balanced rapid development with production reliability. We'd love to hear about a time you improved deployment speed, reduced cloud costs, or implemented security controls without slowing down the team. Bonus if you can share architecture diagrams or performance metrics.

Empower the voices of the world @ Zencastr. If you want to push the world of podcasting into the future, come join a team who loves to live on the edge! We are a fully distributed team of smart people who are passionate about changing the world one voice at a time.

You should join us if you:

• Have significant experience with Node.js and good knowledge of JS fundamentals

• Have a good understanding of computer science fundamentals. You might not have gone to school for it, but you know the difference between heap and stack, different time complexities, and which patterns to use and when.

• You are ambitious. You might want to build your own company one day or have tried to tackle the toughest tech problems just for fun.

• You enjoy writing Javascript or Typescript

• You have an eye for performance. Whether thinking about the latest client side bundling techniques, or the proper way to shard a mongo database, you want things to be fast.

• You are a team player

• You have good communication skills

What sets you apart:

• You have a passion for high performance applications

• You have significant open source contributions

• You want to work in a fast growing startup. Which comes with the blood, sweat and tears of working to disrupt an established industry

• You have empathy for the end user. A spec is a conversation starter, as an advocate for the end user you always are thinking about how to best serve their needs

• You have an eye for code quality and you strive to uphold best practices in engineering, security, and design

Why you should choose us:

• You’ll be working with world class engineers, Phd’s, and designers in a fully distributed team

• Work in an agile and fast changing environment

• Equity commensurate to your contribution in a profitable company

• Health insurance

• Unique challenges and the support and talent to solve them

• 4 weeks PTO

• Freedom to work where you please

What we’re looking for:

• 5+ years of Typescript, Node.js development

• Strong document / key-value store knowledge (Redis, MongoDB)

• Strong SQL knowledge

• Demonstrable knowledge of building scaleable consumer based apps

• Strong experience with unit, integration, and load testing

• Experience building APIs

• Experience with cloud APIs (Google Cloud, Digital Ocean)

Bonus points if you have:

• Experiencing working in high traffic, low latency applications

• Good dev ops experience

• Digital Signal Processing experience

• Strong SQL knowledge

• AI experience

How to apply:

Apply at https://jobs.ashbyhq.com/zencastr/e5897c7a-4622-495b-a892-81763a2ef112

We are flexible! For the right candidate we ask: What do you need to do your best work?

The Role:

We are looking for a Senior Python Developer for one of our clients. You are a perfect candidate if you are growth-oriented, you love what you do, and you enjoy working on new ideas to develop exciting products.

What we are looking for:

• 5+ years of experience building products with Python and Django.

• High proficiency in SQL with experience using databases like PostgreSQL.

• Experience scaling cloud infrastructures with Docker or Kubernetes is a plus.

• Experience managing cloud infrastructures, specifically AWS or GCP.

• You follow the best practices and conventions.

• Relevant experience in CI/CD and related tools.

• Ability to work with minimal supervision.

• Intermediate-advanced English level.

• You can communicate well with both technical and non-technical clients.

Nice-to-have:

• Time zone: CET (+/- 3 hours).

Responsibilities:

• Ability to build libraries and frameworks of reusable efficient code.

• Competence in designing and implementing low-latency, stable and performing applications.

• Capacity to effectively collaborate with other team members and stakeholders remotely.

• Ability to implement data protection systems.

• Competence in data storage solutions.

What we offer:

Get paid, not played

No more unreliable clients. Enjoy on-time monthly payments with flexible withdrawal options.

Predictable project hours

Enjoy a harmonious work-life balance with consistent 8-hour working days with clients.

Flex days, so you can recharge

Enjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify.

Career-accelerating positions at cutting-edge companies

Discover exclusive long-term remote positions at the world's most exciting companies.

Hand-picked opportunities, just for you

Skip the typical recruitment roadblocks and biases with personally matched positions.

One seamless process, multiple opportunities

A one-time contracting process for endless opportunities, with no extra assessments.

Compensation

Enjoy the same pay, every month with positions landed through Proxify.

Original job post link below:

We are hiring a contract-based Senior Elixir Engineer for the garden3d creative collective

About garden3d

We are worker-owned creative collective, innovating on everything from brands and IRL communities to IoT devices and cross-platform apps. We share profit, open source everything, spin out new businesses, and invest in exciting ideas through financial and/or in-kind contributions.

Our client roster includes Google, Stripe, Figma, Hinge, Black Socialists in America, ACLU, Pratt, Parsons, Mozilla, The Nobel Prize, MIT, Gnosis, Etsy & Gagosian. We’re the software team behind innovative products like The Light Phone & Mill, and we a global, decentralized community space collective called Index Space.

We think of our garden3d as a collective for creative people, prioritizing a happy, talented, and erse studio culture. We work on projects that bring value to our world, and we balance deep care for the work we do with a genuine curiosity about life outside of our jobs.

Who we’re looking for:

Right now, we’re looking for a Senior Elixir Engineer with expertise in web, backend and/or native app development, and interest in systems architecture and IoT.

In this role, you’ll work on a variety of client projects to find cost-effective, high-quality, pragmatic solutions to complex problems. You would work on full-stack apps across many industries, from e-commerce to connected hardware products. Responsibilities will include:

• Crafting technical architecture plans through interfacing with clients to understand product requirements
• Developing and optimizing technical solutions while keeping in mind performance, scalability, maintainability, and cost-effectiveness
• Participating in code reviews, providing constructive feedback to teammates and ensuring adherence to best practices
• Contributing to project success by keeping a close eye on team velocity, project scope, budget, and timeline
• Negotiating with clients to align project scope with budget and timeline, if needed

The person we’re looking for is happy, relaxed and easy to get along with. They’re flexible on anything except conceits that will lower their usually outstanding work quality. They work “smart”, by carefully managing their workflow and staggering features that have dependencies intelligently — they prefer deep work but are OK coming up to the surface now and then for top level / strategic conversations.

We believe people with backgrounds or interests in design, art, music, food or fashion tend to have a well rounded sense of design & quality — so a variety of hobbies or side projects is a big nice to have!

Must Have Competencies:

• Fluency in Elixir, and production experience maintaining Elixir Phoenix apps
• 8+ years general experience in backend (Ruby on Rails, Elixir Phoenix, Python Django, or Node Express) and/or native app development (React Native, Flutter, Android, AOSP, Kotlin/Java).
• Comfort with building performant and polished frontend applications (React, CSS, Accessibility, etc)
• Extensive experience with API Design and knowledge of REST and GraphQL, as well as authentication strategies with JWTs and OAuth 2.0.
• Fluency in SQL & database operations, and extensive experience with one of PostgreSQL, MongoDB, MySQL or SQLite.
• Fluency in HTTP, Caching, Status Codes, Security Standards and other Web protocols & patterns.
• Experience with AWS, GCP, or Azure and a core understanding of best practices such as IAM & credential management.
• Production experience with PaaS providers such as Heroku, Render, Cloud66, Vercel, Elastic Beanstalk, EC2, Docker, or Gigalixir.

Nice to Have Competencies:

We’re always pitching for new and exciting technology niches. Some of the areas below are relevant to us!

• Fluency in Elixir LiveView or experience with Rails Hotwire
• Experience working with LLMs, Vector Databases, and other generalist AI-enabled application patterns
• Product management experience, including defining product roadmaps and working closely with stakeholders.
• Hands-on experience with Zenhub, Trello, Jira or similar.
• Client-facing experience, working directly with customers to gather requirements and provide technical solutions.
• Engineering management experience, including leading teams, setting technical direction, and mentoring developers.
• Experience in Hardware, Firmware, or Internet of Things (IoT).
• Native IDEs (Xcode, Android Studio), Languages & Low Level experience (Swift, Rust, C & C++, Clang & LLVM), Electron, V8 & NAN.

Compensation

Our pay scale ranges from $85 p/hr to $130 p/hr pending seniority (& team leadership experience), and our projects are rarely less than 8 full-time weeks at 40 hours per week. Additionally, we pay discretionary bonuses for going over and above — like training & coaching others, winning new business, speaking at conferences, etc.

We prefer long standing relationships with highly accountable and communicative team members, so we encourage candidates to expect longer term engagements. A senior engineer working 40 — 45 full time weeks may take home $150k — $225k USD.

How we interview:

Our interview process starts with a call where you get to meet a few members of our team. From there we’ll ask appropriate candidates to take part in a technical exercise which helps illustrate skill level and comfort.

→ It’s also a great way to see what it’s like to work with us and help support folks who may not have the ‘right title’ but have the experience and technical know-how for the role.

‍ How we work:

We believe that there’s a better balance between the poles of freelancing & full time, and for that reason Sanctuary works differently to most shops:

• Transparency & Ownership: We release out Profit & Loss statements to the community each year, open source our best ideas, and talk business & money with everyone in the company. We’re proud to run our business with integrity, and for that reason we share everything with our team & community.
• **150% Carbon Negative:** Our studio offsets 150% of the carbon we use to do business each year, dated back to our founding in 2015. We turn down work that is not in-line with our morals, and we encourage our peers to do the same. We were certified climate neutral earlier this year.
• **Strong Morals:** Since our founding, we've turned down somewhere between $1mm - $2mm of work that didn't meet our moral standards. (Most of that was DTC brands that can't show a valid sustainability initiative).
• Async & Decentralized: We use tools optimized for calm, thoughtful communication, and opt for async whenever possible. We fight hard to maintain our focus time.
• Remote Friendly: Our company is fluent in remote work, making our workplace more decentralized, and democratized in the process.
• Ideas & Products: In our spare studio time, we work to build our own open source or internal products to ersify & bolster our income. We create amazing technology products for our clients, so why not for the studio?

→ Read more on our Substack, over here, or our Medium, over there.

We’re excited to hear from you! ❤

You can also apply via this form →The garden3d Creative Network

Help us build the future of supply chain intelligence.

We're a small, fast-moving team building a next-generation supply chain AI platform. As a startup, we prioritize development speed and iteration. Creating solid and clean building blocks while delivering meaningful features is top of mind right now. We're well-funded and backed by prominent investors, founded by serial entrepreneurs who've previously raised hundreds of millions and built category-defining companies.

We need a Senior Frontend Engineer with a focus on Svelte who thrives in ambiguous environments, takes ownership, and can translate ideas into working interfaces, even when designs or specs are still in flux.

What You’ll Do:

• Work on frontend architecture and implementation
• Build dynamic, responsive UIs using Svelte (or React, if needed)
• Rapidly prototype features — sometimes before designs are finalized
• Collaborate closely with our designer and backend engineers
• Start with mock data or no data, then wire in backend integrations
• Improve development speed through smart tooling, CI, and test coverage
• Bring a product-minded approach to usability and interaction design
• Contribute to core architecture decisions for a system that works hand-in-hand with AI workflows

You Should Have:

• 5+ years of frontend development experience (ideally in start-up or fast-paced teams)
• Deep experience with Svelte or React (we’re leaning toward Svelte)
• Strong knowledge of component design, performance, and modern frontend practices
• Ability to move quickly from idea to prototype to production
• Self-driven, focused, and capable of working independently with minimal oversight
• Comfortable communicating and making decisions in a distributed team

Bonus Points:

• Built or worked on AI-integrated, data-heavy, or real-time applications
• Experience setting up frontend CI/testing pipelines or using tools like Storybook
• Skilled in UI prototyping and fast idea validation

Why Join Us?

• You’ll have direct impact — this isn’t a cog-in-the-machine role
• Work with a lean team where your decisions shape the product and culture
• Build fast, experiment often, and learn from real users
• High ownership with the flexibility to work where and when you’re most productive
• Join early, grow with the company, and help define what great looks like

The Role:

We are looking for a Senior Vue.js Developer for one of our clients. You are a perfect candidate if you are growth-oriented, you love what you do, and you enjoy working on new ideas to develop exciting products and growth features. 

What we are looking for:

• +5 years experience with Vue.js and object-oriented programming.

• Proficiency in JavaScript, including its syntax and features.

• Strong understanding of the Vue.js framework and its core principles, and ecosystem.

• Working experience with HTML5 and CSS3.

• Knowledge of server-side rendering.

• Ability to write efficient, secure, clean, and scalable code.

• Experience in consuming and designing RESTful APIs.

• Intermediate-advanced English level.

• Ability to communicate well with both technical and non-technical clients.

Nice-to-have:

• Time zone: CET (+/- 3 hours).

• Familiarity with automated JavaScript testing.

• Knowledge of modern development tools, like Git.

• Angular, React,Typescript knowledge.

Responsibilities:

• ​​Design and develop innovative web applications that draw the user’s attention.

• Write reusable, effective, and scalable code.

• Build modular and reusable components and libraries.

• Implement frontend components with Vue.js framework.

• Test, update and optimize the application for performance and security.

• Collaborate with other team members and stakeholders.

What we offer:

Get paid, not played

No more unreliable clients. Enjoy on-time monthly payments with flexible withdrawal options.

Predictable project hours

Enjoy a harmonious work-life balance with consistent 8-hour working days with clients.

Flex days, so you can recharge

Enjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify.

Career-accelerating positions at cutting-edge companies

Discover exclusive long-term remote positions at the world's most exciting companies.

Hand-picked opportunities, just for you

Skip the typical recruitment roadblocks and biases with personally matched positions.

One seamless process, multiple opportunities

A one-time contracting process for endless opportunities, with no extra assessments.

Compensation

Enjoy the same pay, every month with positions landed through Proxify.

Are you a talented Senior Developer looking for a remote job that lets you show your skills and get decent compensation? Look no further than Lemon.io — the marketplace that connects you with hand-picked startups in the US and Europe.

What we offer:

• The rate depends on your seniority level, skills and experience. We've already paid out over $11M to our engineers.
• No more hunting for clients or negotiating rates — let us handle the business side of things so you can focus on what you do best.
• We'll manually find the best project for you according to your skills and preferences.
• Choose a schedule that works best for you. It’s possible to communicate async or minimally overlap within team working hours.
• We respect your seniority so you can expect no micromanagement or screen trackers.
• Communicate directly with the clients. Most of them have technical backgrounds. Sounds good, yeah?
• We will support you from the time you submit the application throughout all cooperation stages.
• Most of our projects involve working in a fast-paced startup environment. We hope you like it as much as we do.
• Through our community, we will connect you with the best developers from more than 50 countries.

We have several Senior React Full-Stack positions available. Here are the general requirements for these roles.

Senior React Native & Node.js Position - Mobile Developer:

• 4+ years of software development experience.
• 3+ years of commercial experience with React Native and Node.js.
• Experience with TypeScript is required.
• Experience with Firebase or AI is a strong plus.

Senior Node & React Position - Full-stack Developer:

• 5+ years of software development experience.
• 5+ years of commercial experience with React.js and Node.js.
• Experience with Next.js, TypeScript, AWS, and Supabase is required.

Other requirements:

• Strong technical skills: as a Senior Developer, you are expected to be able to create projects from scratch and have a deep understanding of application architecture.
• Clear and effective communication in English — advanced ability to discuss business tasks, justify decisions, and communicate issues. Good self-presentation is also essential for upcoming client calls.
• Strong self-organizational skills — ability to work full-time remotely with no supervision.
• Reliability — we want to trust you and expect that you won’t let us and the client down.
• Adaptability and Flexibility — the ability to onboard the project promptly after accepting it and start delivering results quickly.

Sounds good for you? Apply now and join the Lemon.io community!

NOT YOUR TECH STACK?

We have multiple projects available for Senior Developers. If you have 4+ years of commercial software development experience and are proficient in any of the following areas — AI Engineering, React & Python, Data Engineering, Python & LLM, Blockchain, Game Development, WordPress & Figma, Svelte & TypeScript, Svelte & Node, Svelte & Python, or Shopify & JavaScript — we’d be happy to connect and match you with a suitable project.

If your experience matches our requirements, be ready for the next steps:

• VideoAsk — watch a short video about our startup, up to 10 minutes
• Complete your profile on our website
• 30-minute screening call
• Technical interview
• Feedback
• Magic Box (we are looking for the best project for you).

We do not provide visa assistance, and our cooperation model does not include the benefits typically offered with direct hire.

P.S. We work with developers from 50+ countries in different regions: Europe, LATAM, the U.S (if you are an owner of W-9 ben form), Canada, Asia (Philippines, Indonesia), Oceania (Australia, New Zealand, Papua New Guinea), and the the UK. However, we have some exceptions.

At the moment, we don’t have a legal basis to accept applicants from the following countries:

• European: Iceland, Liechtenstein, Kosovo, Belarus, Russia, and Serbia.
• Latin America: Cuba and Nicaragua
• Most Asian countries and Africa.

We expand and shorten the list of exemptions regularly.

We do not provide visa assistance, and our cooperation model does not include the benefits typically offered with direct hire.

Do you represent a company with engineers who match the description and want to collaborate with us through staff augmentation? Then register here.

We’re looking for a Senior iOS Engineer with a strong background in Information Security to join our Mobile team. This is a high-impact role at the intersection of mobile engineering and security, where you’ll help shape the future of mobile device intelligence and fraud prevention.

You’ll be a key contributor to our iOS SDKs—building cutting-edge detection signals, optimizing performance, and delivering an exceptional developer experience. You'll also collaborate closely with product managers, backend engineers, and data analysts to drive innovation through new methodologies and data-informed decisions.

What You’ll Do:

• Lead the development and evolution of our iOS products:

• Fingerprint iOS PRO SDK – Design and implement detection signals; improve performance, stability, and reliability.

• Fingerprint iOS OSS SDK & Showcase App – Maintain and advance our open-source offerings.

• Fingerprint Device Intelligence Demo App – Build new features and implement UI screens from Figma designs using SwiftUI.

• Research and prototype new methodologies that enhance our fraud prevention capabilities, efficiency, and technical edge.

• Conduct post-deployment analysis on collected data and collaborate on improving server-side logic and detection systems.

• Work cross-functionally with backend engineers, PMs, and security researchers to deliver impactful features end-to-end.

What We’re Looking For:

• 5+ years of hands-on iOS development experience in a senior-level capacity.

• Located in EMEA

• Strong foundation in Information Security, with prior experience as an iOS engineer in a security-focused organization or on a security-centric product.

  Demonstrated ability to build native iOS applications and SDKs from the ground up.

• Proficiency in Swift and the iOS SDK; hands-on experience with SwiftUI for UI development.

• Experience building tools for other developers is a strong plus.

• Data-savvy mindset with a comfort level working with product and data teams.

• Excellent written and verbal communication skills; thrive in a remote-first, async team environment.

Nice to Have:

• Experience with GitHub Actions

• Familiarity with obfuscation techniques

• Open-source contributions—share your GitHub profile if applicable.

• Interest in expanding into backend development, such as writing backend detection logic.

• Engagement in the InfoSec community through conference speaking, writing, or active participation.

Software Engineer- Javascript Frameworks - FS Poly Required - 7+ yrs of Experience (Partial Telework) Halogen Engineering is looking for a Software Engineer who has skills and technical experience with Javascript frameworks. Location: Annapolis Junction, MD/Hybrid Travel Required: No Shift: Day Remote Type: Hybrid (Up to 16 hours of telework per week, however telework hours will depend on tasking) Security Clearance: Current TS/SCI Polygraph: Required Salary Range The projected compensation range for this position is 172K to 206K (annualized USD). Salary is determined by various factors, including but not limited to location, the inidual's particular combination of education, knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements. Required Skills Developing applications using AngularJS / React / Vue (other JS frameworks)

Job Description Software Engineer - Back End - 20+ yrs of Experience (PARTIAL TELEWORK) - TS/SCI w/Poly clearance is required Halogen Engineering Group is looking for a Software Engineer with back end experience. Location: Annapolis Junction, MD/Hybrid Travel Required: No

Medical Plans Three available medical plans-2 Platinum PPO Plans ($0 Deductible) and 1 HSA Plan ($1500 deductible)

Software Engineer - UI Developer - 20+ yrs of Experience - PARTAIL REMORE - TS/SCI w/Poly Required Halogen Engineering Group is looking for a Software Engineer that is an experienced UI Developer. Location: Columbia, MD Travel Required: No Shift: Day Remote Type: Onsite Security Clearance: Current TS/SCI Polygraph: Required Salary Range The projected compensation range for this position is 241K to 289K (annualized USD). Salary is determined by various factors, including but not limited to location, the inidual's particular combination of education, knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements. Requirements Analyze user requirements to derive software design and performance requirements Debug existing software and correct defects Provide recommendations for improving documentation and software development process standard Design and code new software or modify existing software to add new features Integrate existing software into new or modified system or operating environment Develop simple data queries for existing or proposed databases or data repositories Write or review software and system documentation Serve as team lead at the level appropriate to the software development process being used on any particular project Capabilities • Analyze user requirements to derive software design and performance requirements • Debug existing software and correct defects • Provide recommendations for improving documentation and software development process standard • Design and code new software or modify existing software to add new features • Integrate existing software into new or modified system or operating environment • Develop simple data queries for existing or proposed databases or data repositories • Write or review software and system documentation • Serve as team lead at the level appropriate to the software development process being used on any particular project • Design or implement complex database or data repository interfaces/queries • Develop or implement algorithms to meet or exceed system performance and functional standards • Assist with developing and executing test procedures for software component • Develop software solutions by analyzing system performance standards, confer with users or system engineers; analyze systems flow, data usage and work processes; and investigate problem areas • Modify existing software to correct errors, to adapt to new hardware, or to improve its performance • Design, develop and modify software systems, using scientific analysis and mathematical models to predict and measure outcomes and consequences of design • Design or implement complex algorithms requiring adherence to strict timing, system resource, or interface constraints; Perform quality control on team products • Implement recommendations for improving documentation and software development process standards • Oversee one or more software development teams and ensure the work is completed in accordance with the constraint of the software development process being used on any particular project • Confer with system engineers and hardware engineers to derive software requirements and to obtain information on project limitations and capabilities, performance requirements and interfaces • Coordinate software system installation and monitor equipment functioning to ensure operational specifications are met • Recommend new technologies and processes for complex software projects • Serve as the technical lead of multiple software development teams • Select the software development process in coordination with the customer and system engineering • Ensure quality control of all developed and modified software • Delegate programming and testing responsibilities to one or more team and monitor their performance Qualifications A Bachelor's degree in computer science or related discipline from an accredited college or university, plus twenty (20) years of experience as a SWE, in programs and contracts of similar scope, type, and complexity OR

Job Title : Xpedition ECAD Layout Designer - Remote Location: Remote - USA Wage Range: 60-65 Job Number: 25-02954 Job Description: Our client, a large defense contractor, has an immediate opening for a Xpedition ECAD Layout Designer to work remote from the USA. The Senior Advanced Electrical Computer-aided Design (ECAD) Designer opening provides an opportunity to develop the cutting-edge technology that supports some of our nation's fundamental defense services. GDMS employees work closely with esteemed clients to develop solutions that allow them to carry out high-stakes national security missions. The selected candidate will work with collaborative teams to design, develop and manage CAD software solutions for our client. In addition to receiving a competitive salary and generous health and personal benefits, the Senior Computer-aided Design Software Engineer will enhance their skill set by working among a talented and technically accomplished group of colleagues. The employee will also enjoy a flexible work environment where contributions are recognized and rewarded. The Senior Electrical Computer-aided Design Engineer will possess a thorough understanding of the design and documentation requirements for Printed Circuit boards. In addition, the qualified candidate must be experienced in generating printed board designs for digital signal processing, hi-frequency radio frequency designs, and understand routing principles relating to hi-speed routing and interference design. Candidate must have: Experience Xpedition VX2.13 or higher Multi-layer experience up to 20 layers Knowledge of PCB design and fabrication details Experience working in an Integrated Product Team environment Extensive experience in design, drafting, detailing and packaging of PCB board layout designs that include, but are not limited to symbol, cell and footprint generation, PCB layout, PCB electronic packaging, PCB drawing generation Experience troubleshoot design data and configuration problems with outside vendors Ability to multi-task and handle numerous jobs simultaneously. Qualifications: Bachelor's degree in a related specialized area or field or equivalent is required plus a minimum of 8 years of relevant experience; or Master's degree plus a minimum of 6 years of relevant experience. Due to the nature of work performed within our facilities, U.S. citizenship is required. Additional Responsibilities Deliver innovative, flexible, integrated solutions to meet changing business needs in PCB design. Support and engage in programs, projects and practices behind the our client's culture and strategy, and comply with all policies and procedures. Follow industry and department trends and developments to ensure our client's services are consistent with, and/or superior to, industry best practices. Candidates should demonstrate sophisticated problem solving skills, as well as an ability to design, develop and implement innovative client solutions. Equal opportunity employer as to all protected groups, including protected veterans and iniduals with disabilities While an hourly range is posted for this position, an eventual hourly rate is determined by a comprehensive salary analysis which considers multiple factors including but not limited to: job-related knowledge, skills and qualifications, education and experience as compared to others in the organization doing substantially similar work, if applicable, and market and business considerations. Benefits offered include medical, dental and vision benefits; dependent care flexible spending account; 401(k) plan; voluntary life/short term disability/whole life/term life/accident and critical illness coverage; employee assistance program; sick leave in accordance with regulation. Benefits may be subject to generally applicable eligibility, waiting period, contribution, and other requirements and conditions.

About the Role

This role will focus on driving the design and implementation of general software that empowers our operations teams to better serve our healthcare providers, thus giving them more time to focus on patients and deliver better services. We are looking for someone with a minimum of two years of software engineering experience.

What You’ll Do

• Build end-to-end products to to scale and empower our operations teams

• Be a part of a tremendously fast-paced team that celebrates fast execution and decision

• Work across the entire software stack

• Work with a stack that includes Python, Vue, React Native, Flask, and other frameworks

What You Have

• At least five years of production software engineering experience

• Expert in Python

• Able to work on both frontend (JavaScript, TypeScript, React) and backend (Python) in general and deliver product end-to-end

• Basic understanding of cloud solutions (GCP, Docker, Kubernetes)

• Familiarity with modern software development methodologies and cycles

• Understand standard web-based technologies, such as restful standards and relational databases (eg, PostgreSQL)

• Have a strong product engineering sense with a can-do builder attitude

• Able to identify opportunities to improve the current process

• Strong proficiency in the English language, including the ability to articulate ideas clearly and concisely in both verbal and written formats.

Bonus Points If You Have

• Having worked on greenfield projects before, build and ship products from scratch

• Worked in the healthcare industry before

• Experience working in a fast pace environment (we ship fast)

• Remote work experience

• Familiarity with BI software

The first stage will be a basic take-home assessment. Once we review the submission and the feedback is positive, we will contact you to schedule the first interview.

Note: You will not be eligible for benefits as an international contractor at this time.

Why you’ll love working at Commure + Athelas:

• Highly Driven Team: We work hard and fast for exceptional results, knowing we’re doing mission-driven work to transform the country’s largest sector. 

• Strong Backing: We are backed by top investors including General Catalyst, Sequoia, Y Combinator, Lux, Human Capital, 8VC, Greenoaks Capital and Elad Gil. 

• Incredible Growth: Prior to our merger, Commure and Athelas had independently grown more than 500% YoY for three consecutive years. We’ve achieved Series D funding, have an industry-leading runway, and continue to scale rapidly. 

Synertex LLC is seeking a Software Engineer to support a U.S. Federal Government Agency in McLean, VA / Pentagon. We are expanding work on a current contract and need a Software Engineer with experience in both front and back-end development to provide innovative solutions to the client's most pressing requirements. Additionally, the Software Developer will have a keen understanding of open-source data development tools and processes. This is a hybrid remote position with some on-site requirements that require a candidate to be within reasonable commutable distance to McLean, VA and/or the Pentagon. Join our team of data visualization experts to focus on delivering practical and efficient solutions in support of our client's incredibly important mission. Benefits include competitive PTO, 11 Paid Government Holidays, a 401k with 6% match, and a comprehensive list of health care options. Clearance required: US citizen willing to obtain a TS/SCI Clearance and pass a polygraph. RESPONSIBILITIES: Work within a team environment to develop a software-based platform that will facilitate rapid decision making and increased situational awareness across a variety of users, disciplines, and geographic locations. Build robust, maintainable, well documented, and well tested enterprise-level applications. Communicate effectively both verbally and in writing with the customer and other team members. Including managers, data scientists, DevOps engineers, and other senior and junior/midlevel developers. Work on developing / integrating / operationalizing full-stack advanced analytic web applications through the Authority to Operate (ATO) process on classified networks. REQUIREMENTS: 6-10 years of experience. Experience and knowledge of web application development using Python and Django. Experience using Docker / Docker Compose. Knowledge and experience of classified government networks and Amazon Web Services (AWS) including RDS Aurora, and ECS / EKS, VPC, ALB Linux / UNIX Familiarity with Government ATO application compliance, approval, and deployment.

Test Engineer Sr Advisor Department of Corrections OSSD ASD has an opportunity for a dynamic and collaborative senior test engineer to join our team that is working on highly visible web application for a government client. We are looking for energetic iniduals who want to enhance their professional career in a fast-paced federal environment at doing cutting edge work. The main responsibilities include but not limited to: Design, develop, and execute comprehensive test plans and test cases for web application features Identify, document, and track bugs and issues using bug tracking systems Verify bug fixes and perform regression testing to ensure stability

We are looking for expert RoR and React developers who are quick learners and passionate about their work.

Why Join Us?

• Stable and self-funded: Founded in 2008, OTGS is proudly profitable and not dependent on external investments.
• Fully remote global team: Collaborate with talented colleagues worldwide.
• Industry leaders: Creators of WPML, the №1 multilingual plugin for WordPress, powering over 1.5 million sites.
• Innovative projects: Currently building PTC (Private Translation Cloud), our next-generation SaaS platform for seamless software localization.
• Professional growth: Structured mentorship programs for new team members.
• Excellent benefits: Designed to support your well-being both inside and outside of work.
• Positive culture: Genuinely kind, collaborative, and professional work environment.
• Career advancement: Real opportunities for internal promotion and professional development.

Indicators You're a Great Fit

• You have strong experience with Ruby on Rails and at least one modern JavaScript framework.
• You're passionate about writing clean, maintainable, and high-quality code.
• You have proven experience building and scaling robust systems.
• You thrive on solving complex challenges independently within a collaborative team environment.

What You'll Do

As a valued developer on our team, you’ll participate in:

• Feature planning and implementation
• Maintenance and optimization
• Test automation

Learn more about our PTC project, its current status, technology stack, and upcoming milestones.

Ready to make a meaningful impact at a company that values innovation and teamwork? Apply today and join our global team!

We're looking for Senior PHP and JS developers who are passionate about quality, love solving challenging problems, and enjoy building products used by millions.

Why Join Us?

• Trusted & Profitable: Since 2007, OTGS has grown into a self-funded and stable company supporting over 1.5 million websites worldwide.

• Remote-first: Join a erse team of smart and friendly people working from all corners of the world.

• Creators of WPML: You'll contribute to the #1 multilingual plugin for WordPress, used by hundreds of thousands of happy clients every day.

• Real Impact: Your work will directly improve the experience of users around the globe.

• Growth-friendly: We support your personal and professional development through mentorship, learning tools, and internal opportunities.

• Wellbeing focused: We offer great benefits to help you thrive both in and out of work.

Indicators You're a Great Fit

• Strong experience with PHP, and JS

• Deep understanding of databases, code architecture, and design patterns

• Passion for writing automated tests (PHPUnit, E2E, etc.)

What You'll Do

As a key player on the team, you will:

• Analyze and fix compatibility issues with third-party plugins and themes.

• Collaborate with external developers to ensure smooth WPML integration.

• Build internal tools and test cases to streamline workflows.

• Take ownership of your code – from writing to testing and delivery.

Ready to make a meaningful impact at a company that values innovation and teamwork? Apply today and join our global team!

Empower the voices of the world @ Zencastr. If you want to push the world of podcasting into the future, come join a team who loves to live on the edge! We are a fully distributed team of smart people who are passionate about changing the world one voice at a time.

You should join us if you:

• Have significant experience with Node.js and good knowledge of JS fundamentals

• Have a good understanding of computer science fundamentals. You might not have gone to school for it, but you know the difference between heap and stack, different time complexities, and which patterns to use and when.

• You are ambitious. You might want to build your own company one day or have tried to tackle the toughest tech problems just for fun.

• You enjoy writing Javascript or Typescript

• You have an eye for performance. Whether thinking about the latest client side bundling techniques, or the proper way to shard a mongo database, you want things to be fast.

• You are just as comfortable working in a browser context or a node.js runtime

• You are a team player

• You have good communication skills

What sets you apart:

• You have a passion for high performance applications

• You have significant open source contributions

• You want to work in a fast growing startup. Which comes with the blood, sweat and tears of working to disrupt an established industry

• You have empathy for the end user. A spec is a conversation starter, as an advocate for the end user you always are thinking about how to best serve their needs

• You have an eye for code quality and you strive to uphold best practices in engineering, security, and design

Why you should choose us:

• You’ll be working with world class engineers, Phd’s, and designers in a fully distributed team

• Work in an agile and fast changing environment

• Equity commensurate to your contribution in a profitable company

• Health insurance

• Unique challenges and the support and talent to solve them

• 4 weeks PTO

• Freedom to work where you please

What we’re looking for:

• 5+ years of Typescript, React, Node.js development

• Strong document / key-value store knowledge (Redis, MongoDB)

• Strong SQL knowledge

• Strong HTML / CSS / React knowledge

• Demonstrable knowledge of building scaleable consumer based apps

• Strong experience with unit, integration, and load testing

• Experience building APIs

• Experience with cloud APIs (Google Cloud, Digital Ocean)

Bonus points if you have:

• Experiencing working in high traffic, low latency applications

• Good dev ops experience

• Digital Signal Processing experience

• Strong SQL knowledge

How to apply:

Apply at https://jobs.ashbyhq.com/zencastr/c4c91cc0-c5f9-4773-ab04-d239f9455aee

We are flexible! For the right candidate we ask: What do you need to do your best work?

Overview:

Ready to be pushed beyond what you think you’re capable of?

To achieve our mission, we’re seeking a very specific candidate. We want someone who is passionate about our mission and who believes in the power of crypto and blockchain technology to update the financial system. We want someone who is eager to leave their mark on the world, who relishes the pressure and privilege of working with high caliber colleagues, and who actively seeks feedback to keep leveling up. We want someone who will run towards, not away from, solving the company’s hardest problems.

While many roles at Coinbase are remote-first, we are not remote-only. In-person participation is required throughout the year. Team and company-wide offsites are held multiple times annually to foster collaboration, connection, and alignment. Attendance is expected and fully supported.

The Coinbase Developer Platform APIs are the easiest way for developers to get started with building crypto applications. Conceived by Coinbase CEO Brian Armstrong, these APIs enable those with no prior knowledge of crypto to begin sending and receiving crypto in as little as 30 seconds. A top priority of the Coinbase Developer Platform (CDP), the CDP APIs encapsulate some of the most cutting-edge technologies in crypto by externalizing Coinbase’s internal services, built over more than a decade of experience. The CDP APIs combine custodial and non-custodial wallets into one clean abstraction, making interactions with the blockchain simple and painless.

The CDP API team owns both server-side APIs and client-side libraries across different languages. The team seeks a full-stack engineer who is passionate about all aspects of excellent developer experiences: authoring clear and informative documentation, building compelling sample applications, interacting directly with customers to incorporate feedback, architecting delightfully simple SDKs, etc. The engineer must be comfortable operating in both frontend and backend codebases, fluent across a variety of programming languages, and demonstrate both high code velocity and quality simultaneously. The CDP API team consists of some of the most prolific and tenured software engineers at Coinbase, and is excited to ship a game-changing set of APIs and SDKs at breakneck speed.

What you’ll be doing (ie. job duties):

⦁    Design, develop, and maintain scalable, secure, and high-performance backend systems for the CDP APIs using Go and Javascript

What we look for in you (ie. job requirements):

⦁    5+ years of experience in both backend and frontend software development

Are you a talented Senior Developer looking for a remote job that lets you show your skills and get decent compensation? Look no further than Lemon.io — the marketplace that connects you with hand-picked startups in the US and Europe.

What we offer:

• The rate depends on your seniority level, skills and experience. We've already paid out over $11M to our engineers.
• No more hunting for clients or negotiating rates — let us handle the business side of things so you can focus on what you do best.
• We'll manually find the best project for you according to your skills and preferences.
• Choose a schedule that works best for you. It’s possible to communicate async or minimally overlap within team working hours.
• We respect your seniority so you can expect no micromanagement or screen trackers.
• Communicate directly with the clients. Most of them have technical backgrounds. Sounds good, yeah?
• We will support you from the time you submit the application throughout all cooperation stages.
• Most of our projects involve working in a fast-paced startup environment. We hope you like it as much as we do.
• Through our community, we will connect you with the best developers from more than 50 countries.

We have several Senior React Full-Stack positions available. Here are the general requirements for these roles.

Senior React & Python Position

• 4+ years of software development experience.
• 3+ years of commercial experience with React.js and Python.
• Experience with AWS, GCP, or Azure is required.
• Experience with Next.js, Node.js, Django, TypeScript, or AI is a strong plus.

Other requirements:

• Strong technical skills: as a Senior Developer, you are expected to be able to create projects from scratch and have a deep understanding of application architecture.
• Clear and effective communication in English — advanced ability to discuss business tasks, justify decisions, and communicate issues. Good self-presentation is also essential for upcoming client calls.
• Strong self-organizational skills — ability to work full-time remotely with no supervision.
• Reliability — we want to trust you and expect that you won’t let us and the client down.
• Adaptability and Flexibility — the ability to onboard the project promptly after accepting it and start delivering results quickly.

Sounds good for you? Apply now and join the Lemon.io community!

NOT YOUR TECH STACK?

We have multiple projects available for Senior Developers. If you have 4+ years of commercial software development experience and are proficient in any of the following areas — AI Engineering, React & Node, Golang, Python & LLM, React Native & Node, Blockchain, WordPress & Figma, Svelte & TypeScript, Svelte & Node, Svelte & Python, or Shopify & JavaScript — we’d be happy to connect and match you with a suitable project.

If your experience matches our requirements, be ready for the next steps:

• VideoAsk — watch a short video about our startup, up to 10 minutes
• Complete your profile on our website
• 30-minute screening call
• Technical interview
• Feedback
• Magic Box (we are looking for the best project for you).

We do not provide visa assistance, and our cooperation model does not include the benefits typically offered with direct hire.

P.S. We work with developers from 50+ countries in different regions: Europe, LATAM, the U.S (if you are an owner of W-9 ben form), Canada, Asia (Philippines, Indonesia), Oceania (Australia, New Zealand, Papua New Guinea), and the the UK. However, we have some exceptions.

At the moment, we don’t have a legal basis to accept applicants from the following countries:

• European: Iceland, Liechtenstein, Kosovo, Belarus, Russia, and Serbia.
• Latin America: Cuba and Nicaragua
• Most Asian countries and Africa.

We expand and shorten the list of exemptions regularly.

We do not provide visa assistance, and our cooperation model does not include the benefits typically offered with direct hire.

Do you represent a company with engineers who match the description and want to collaborate with us through staff augmentation? Then register here.

Peerspace is hiring a remote Staff Data Engineer. This is a full-time position that can be done remotely anywhere in the United States.

Peerspace - Unique venues for meetings, events, photo & film shoots.

Mattermost is hiring a remote Full Stack Engineer. This is a full-time position that can be done remotely anywhere in the United States.

Mattermost - A flexible, open source messaging platform.

Bitwarden is hiring a remote Full Stack Software Engineer (Tools). This is a full-time position that can be done remotely anywhere in the United States.

Bitwarden - Open source password management solutions for iniduals, teams, and businesses.

Original job post link:

Senior Elixir Engineer Original Job Post Link

🌎 About garden3d

We are a worker-owned creative collective, innovating on everything from brands and IRL communities to IoT devices and cross-platform apps. We share profit, open source everything, spin out new businesses, and invest in exciting ideas through financial and/or in-kind contributions.

Our client roster includes Google, Stripe, Figma, Hinge, Black Socialists in America, ACLU, Pratt, Parsons, Mozilla, The Nobel Prize, MIT, Gnosis, Etsy & Gagosian. We’re the software team behind innovative products like The Light Phone & Mill, and we a global, decentralized community space collective called Index Space.

We think of our garden3d as collective for creative people, prioritizing a happy, talented, and erse studio culture. We work on projects that bring value to our world, and we balance deep care for the work we do with a genuine curiosity about life outside of our jobs.

🔮 Who we’re looking for:

Right now, we’re looking for a Senior Elixir Engineer with expertise in web, backend and/or native app development, and interest in systems architecture and IoT.

In this role, you’ll work on a variety of client projects to find cost-effective, high-quality, pragmatic solutions to complex problems. You would work on full-stack apps across many industries, from e-commerce to connected hardware products. Responsibilities will include:

• Crafting technical architecture plans through interfacing with clients to understand product requirements
• Developing and optimizing technical solutions while keeping in mind performance, scalability, maintainability, and cost-effectiveness
• Participating in code reviews, providing constructive feedback to teammates and ensuring adherence to best practices
• Contributing to project success by keeping a close eye on team velocity, project scope, budget, and timeline
• Negotiating with clients to align project scope with budget and timeline, if needed

The person we’re looking for is happy, relaxed and easy to get along with. They’re flexible on anything except conceits that will lower their usually outstanding work quality. They work “smart”, by carefully managing their workflow and staggering features that have dependencies intelligently — they prefer deep work but are OK coming up to the surface now and then for top level / strategic conversations.

We believe people with backgrounds or interests in design, art, music, food or fashion tend to have a well rounded sense of design & quality — so a variety of hobbies or side projects is a big nice to have!

💸 Compensation

Our pay scale ranges from $85 p/hr to $130 p/hr pending seniority (& team leadership experience), and our projects are rarely less than 8 full time weeks at 40 hours per week. Additionally, we pay discretionary bonuses for going over and above — like training & coaching others, winning new business, speaking at conferences, etc.

We prefer long standing relationships with highly accountable and communicative team members, so we encourage candidates to expect longer term engagements. A senior engineer working 40 — 45 full time weeks may take home $150k — $225k USD.

🔑 Must Have Competencies:

• Fluency in Elixir, and production experience maintaining Elixir Phoenix apps
• 8+ years general experience in backend (Ruby on Rails, Elixir Phoenix, Python Django, or Node Express) and/or native app development (React Native, Flutter, Android, AOSP, Kotlin/Java).
• Comfort with building performant and polished frontend applications (React, CSS, Accessibility, etc)
• Extensive experience with API Design and knowledge of REST and GraphQL, as well as authentication strategies with JWTs and OAuth 2.0.
• Fluency in SQL & database operations, and extensive experience with one of PostgreSQL, MongoDB, MySQL or SQLite.
• Fluency in HTTP, Caching, Status Codes, Security Standards and other Web protocols & patterns.
• Experience with AWS, GCP, or Azure and a core understanding of best practices such as IAM & credential management.
• Production experience with PaaS providers such as Heroku, Render, Cloud66, Vercel, Elastic Beanstalk, EC2, Docker, or Gigalixir.

💪 Nice to Have Competencies:

We’re always pitching for new and exciting technology niches. Some of the areas below are relevant to us!

• Fluency in Elixir LiveView or experience with Rails Hotwire
• Experience working with LLMs, Vector Databases, and other generalist AI-enabled application patterns
• Product management experience, including defining product roadmaps and working closely with stakeholders.
• Hands-on experience with Zenhub, Trello, Jira or similar.
• Client-facing experience, working directly with customers to gather requirements and provide technical solutions.
• Engineering management experience, including leading teams, setting technical direction, and mentoring developers.
• Experience in Hardware, Firmware, or Internet of Things (IoT).
• Native IDEs (Xcode, Android Studio), Languages & Low Level experience (Swift, Rust, C & C++, Clang & LLVM), Electron, V8 & NAN.

🎤 How we interview:

Our interview process starts with a call where you get to meet a few members of our team. From there we’ll ask appropriate candidates to take part in a technical exercise which helps illustrate skill level and comfort.

→ It’s also a great way to see what it’s like to work with us and help support folks who may not have the ‘right title’ but have the experience and technical know-how for the role.

👩‍🏭 How we work:

We believe that there’s a better balance between the poles of freelancing & full time, and for that reason Sanctuary works differently to most shops:

• Transparency & Ownership: We release out Profit & Loss statements to the community each year, open source our best ideas, and talk business & money with everyone in the company. We’re proud to run our business with integrity, and for that reason we share everything with our team & community.
• **150% Carbon Negative:** Our studio offsets 150% of the carbon we use to do business each year, dated back to our founding in 2015. We turn down work that is not in-line with our morals, and we encourage our peers to do the same. We were certified climate neutral earlier this year.
• **Strong Morals:** Since our founding, we've turned down somewhere between $1mm - $2mm of work that didn't meet our moral standards. (Most of that was DTC brands that can't show a valid sustainability initiative).
• Async & Decentralized: We use tools optimized for calm, thoughtful communication, and opt for async whenever possible. We fight hard to maintain our focus time.
• Remote Friendly: Our company is fluent in remote work, making our workplace more decentralized, and democratized in the process.
• Ideas & Products: In our spare studio time, we work to build our own open source or internal products to ersify & bolster our income. We create amazing technology products for our clients, so why not for the studio?

→ Read more on our Substack, over here, or our Medium, over there.

Please click this Important link below or copy the URL (Same as the apply button) to proceed with your application by telling us a bit more about your interest in the role:

garden3d Creative Form

Salary and compensation

Benefits

🌎 Distributed team

⏰ Async

About Us

We are a dynamic hedge fund specializing in cryptocurrency arbitrage strategies. Our proprietary platform aggregates order books from centralized exchanges (CEXs) like Binance and decentralized exchanges (DEXs) like Uniswap to identify and execute high-frequency trading opportunities. We’re building a robust, scalable infrastructure to support our growing operations in the fast-paced crypto markets. If you’re passionate about low-latency systems, real-time data processing, and fintech innovation, join us to help shape the backbone of our trading engine.

Role Overview

As a Senior Software Engineer focused on Crypto Trading Infrastructure, you will be responsible for designing, building, and maintaining the core systems that power our arbitrage & market making framework. This role emphasizes infrastructure development, including data pipelines, integrations with exchanges, and scalable architectures. You’ll work closely with the fund’s leadership to implement reliable, high-performance solutions while ensuring security and efficiency. Note: Strategy development will be handled internally, so your focus will be on engineering excellence to support predefined trading logic.

This is a full-time position, remote-friendly, with competitive compensation including base salary, performance bonuses tied to fund success.

Key Responsibilities

• Design and implement scalable infrastructure for real-time data aggregation from CEXs and DEXs, including WebSocket clients, API integrations, and order book processing.
• Build and optimize data storage and caching systems using technologies like Redis for high-speed access and SQL databases for trade logging and analytics.
• Develop messaging and communication layers (e.g., using ZMQ) to ensure seamless interaction between services in our Python-based framework.
• Enhance system reliability with fault-tolerant designs, error handling, monitoring, and alerting to minimize downtime in live trading environments.
• Scale the platform for increased volume, incorporating cloud infrastructure (e.g., AWS, GCP) for deployment, containerization (Docker/Kubernetes), and CI/CD pipelines.
• Collaborate on integrating new exchanges, protocols, or tools while maintaining code quality through unit testing, code reviews, and best practices.
• Troubleshoot and optimize for low-latency performance, security (e.g., API key management, encryption), and compliance in a regulated financial context.
• Contribute to documentation and knowledge sharing to support team growth.
• Build and maintain real-time portfolio performance monitoring dashboards using robust database infrastructure (eg. Google Studio, Grafana, others)

Required Qualifications

• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field.
• 5+ years of experience as a software engineer, with a focus on backend development in high-stakes environments like fintech, trading platforms, or real-time systems.
• Strong proficiency in Python, including experience with libraries for data handling (e.g., Pandas, NumPy) and asynchronous programming (e.g., asyncio).
• Hands-on experience with databases and caching (e.g., Redis, SQL/PostgreSQL) and messaging queues (e.g., ZMQ, Kafka, or RabbitMQ).
• Familiarity with API integrations, WebSockets, and real-time data streams, ideally in crypto or financial markets.
• Knowledge of cloud platforms (AWS/GCP/Azure) and DevOps tools (e.g., Docker, Kubernetes, Terraform) for building scalable infrastructure.
• Understanding of performance optimization, concurrency, and security best practices in distributed systems.
• Excellent problem-solving skills and the ability to work independently in a fast-paced, startup-like environment.

Preferred Qualifications

• Experience in cryptocurrency or DeFi ecosystems, such as building trading bots, DEX integrations (e.g., Web3.py, Uniswap APIs), or handling blockchain data.
• Background in low-latency trading systems, high-frequency trading (HFT), or arbitrage platforms.
• Familiarity with our tech stack elements (e.g., Redis-based clients, ZMQ messaging) or similar frameworks.
• Contributions to open-source projects or experience in regulated finance (e.g., SEC compliance basics).
• Strong English reading and writing communication skills

What We Offer

• Competitive salary and bonuses based on inidual and fund performance.
• 20% of trading profits.
• Flexible remote work with occasional team meetups.
• Opportunities for professional development, including conferences and training in crypto/fintech.
• A collaborative culture where your infrastructure expertise directly impacts trading success.

To apply, please send your resume to [email protected]. We look forward to building the future of crypto arbitrage with you!

We are seeking a versatile Full Stack Developer with hands-on experience across both frontend and backend technologies to design, develop, and maintain dynamic web and mobile applications. The ideal candidate has a strong understanding of modern development practices, is comfortable working with cloud environments (AWS), and is skilled in creating seamless user experiences and robust backend systems. This is an exciting opportunity to contribute to impactful client-facing applications in a collaborative and fast-paced environment.Key Responsibilities* Design, develop, test, and deploy responsive web and mobile applications.* Build and maintain APIs and backend services using .NET (C#) or Python* Develop visually appealing and user-friendly frontends using JavaScript frameworks like React and React Native.* Implement clean, maintainable code with best practices in UI/UX, accessibility, and performance.* Collaborate with cross-functional teams using tools like GitHub, Jira, Confluence, and Visual Studio.* Work with SQL-based databases (Postgres, MSSQL, Snowflake) and develop data components including queries and reports using SSIS/SSRS.* Support infrastructure and deployment via DevOps practices and tools like Terraform.* Troubleshoot issues, optimize performance (application, server, and database), and advocate for technical solutions.* Leverage cloud technologies (AWS) for scalable application development and deployment.* Participate in the design of proofs-of-concept, wireframes, and prototypes to illustrate new functionality or workflows.* Provide technical support and ongoing enhancements for platforms such as Salesforce, Workday, ARGO, and ServiceNow.Requirements* 2–5 years of experience developing component-based web, mobile, or desktop applications.* Proficiency in frontend technologies: HTML, CSS (including preprocessors), JavaScript, Node.js, React, React Native, and related build tools.* Strong backend development experience with .NET (C#), Python, and VB.NET.* Solid understanding of SQL databases (Postgres, MSSQL, Snowflake) and reporting tools (SSIS/SSRS).* Experience working with AWS cloud services.* Familiarity with DevOps workflows and infrastructure-as-code tools like Terraform.* Knowledge of software development tools including Visual Studio, GitHub, Jira, and Confluence.* Ability to troubleshoot, self-advocate, and communicate effectively in a collaborative team environment.* Exposure to enterprise platforms like Salesforce, Workday, ARGO, and ServiceNow is a plus.* Strong grasp of user-centered design principles and best practices in performance and usability.If you're passionate about building high-quality applications, enjoy working across the full technology stack, and thrive in collaborative environments, we’d love to hear from you. This is a great opportunity to grow your skills, contribute to impactful projects, and be part of a forward-thinking team.Apply today and help us shape the future of digital solutions. #Salary and compensation

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About CoW DAO

CoW DAO is on a mission to protect Ethereum users from MEV and optimize trade execution across DeFi. We achieve this through the CoW Protocol, CoW Swap (a leading intent-based DEX aggregator), and the innovative MEV Blocker, which together help secure, aggregate, and route trades for optimal outcomes. We also fund values-aligned projects via the CoW Grants Program.

CoW Protocol is consistently ranked among the top DEX aggregators by monthly volume and is the largest intent-based exchange. Our MEV Blocker protects trades from harmful MEV extraction and is integrated across the Ethereum ecosystem. The CoW AMM is the only live AMM designed to protect liquidity providers from LVR (loss-versus-rebalancing).

With over 100 open-source repositories on Dune Analytics dashboard showcases billions in cumulative trading volume and a rapidly growing user base. As we continue to scale, CoW DAO remains at the forefront of DeFi innovation, prioritizing security, efficiency, and decentralization.

Learn more

About the role

Location: We are a fully remote team, and although we hire almost globally, there is a preference for this role to be based in Europe or remote +/- 4 hours CEST time

Please note we’re not hiring from the US, Australia, or New Zealand

Position: Full-time contractor

We’re looking for a motivated Junior Backend Engineer to support the deployment of CoW Protocol on new blockchain networks, troubleshoot and debug issues, support our on-call rotation, and contribute to our engineering backlog. This role offers a unique opportunity to grow within the position and become a highly skilled Rust Engineer in a production-level Web3 environment.

This is a great fit if you’re someone early in your career who’s excited about learning Rust, solving complex problems, and taking initiative

What You’ll Do

• Help deploy and maintain CoW Protocol across new and existing blockchain networks
• Investigate and debug issues in production environments
• Participate in our on-call rotation (with additional compensation)
• Contribute to the engineering backlog and assist with feature development
• Collaborate with experienced engineers and gradually take on more ownership of Rust-based services

Who You Are

• Recently graduated or have around 3 years of backend experience
• Hands-on experience with Rust, either through personal projects, open-source contributions, or commercial work
• Solid understanding of blockchain and Web3 — you’re familiar with the space, its core concepts, and have prior exposure through work, projects, hackathons or contributions
• Strong problem-solving skills and the ability to work independently
• Proactive mindset, you take initiative and figure things out
• Comfortable working remotely in a highly autonomous, async environment

What we can offer you

• Flexible work environment: Join our hub in Lisbon or work remotely
• Token plan: Have a stake in our mission and shape the future of CoW DAO
• Periodic gatherings: Enjoy opportunities to connect with the rest of the team through regular trips
• Conference allocation: Stay up-to-date with ecosystem advancements using our conference budget
• Learning budget: Use our learning budget to support your higher ambitions
• Hardware budget: Take advantage of a hardware budget for acquiring necessary equipment
• Make an impact: You are joining a startup where you can make a huge difference. Your work matters!
• Flat hierarchies mean fewer processes and bureaucracy - see more of your ideas come to life!
• Flexible work and vacation times: Prioritize work-life balance through our robust flexible work policy and vacation allowance
• Growth: If you’re someone who loves taking the initiative and getting things done, CoW offers lots of opportunities for your inidual growth

Referral Program

Earn 3.000 USDC or USD with the refer-to-earn program. More details here.

Culture

Life within the CoW Protocol is an incredible adventure! We take pride in our collaborative approach, embracing autonomy and fostering a culture of big thinking and continuous growth. We value impact, ownership, simplicity, and team spirit. Plus, we’re all about feedback, coming together, and enjoying the journey along the way!

At CoW Protocol, we strive to create a space where everyone feels included and empowered. We believe that our products and services benefit from our erse backgrounds and experiences. All qualified applicants are considered for positions regardless of race, ethnic origin, age, religion or belief, marital status, gender identification, sexual orientation, or physical ability.

Who We Are:

Ethena Labs is at the forefront of the next wave of DeFi, dedicated to building products for modern finance. Ethena is a synthetic dollar protocol built on Ethereum that provides a crypto-native solution for money, USDe, alongside a globally accessible dollar savings asset, sUSDe.

Our core mission is to provide truly crypto-native financial solutions that are globally accessible and bridge the gap between TradFi and the digital asset economy. We believe in transparency, efficiency, and empowering both iniduals and institutions with greater control over their assets.

What we are Doing:

Ethena Labs is actively building and deploying a suite of groundbreaking products designed to address key challenges and unlock new opportunities within the digital finance landscape.

Our flagship product, USDe, is a synthetic dollar backed by digital assets, and takes the novel approach of using a delta-neutral hedging strategy to maintain its peg. This provides a truly scalable and censorship-resistant digital dollar.

Building upon USDe, we offer sUSDe. sUSDe provides crypto-native rewards generated from funding rates in derivatives markets, offering an alternative to existing products tethered to the traditional financial system.

Furthermore, we are actively developing solutions to facilitate institutional adoption of digital assets. In partnership with Securitize and Blackrocks BUIDL fund, USDtb provides a more traditional, asset-backed stablecoin option, leveraging established financial infrastructure to appeal to institutional clients. Expanding on this, iUSDe is designed specifically for traditional financial institutions, incorporating necessary compliance features to enable them to access the crypto-native rewards our protocol generates, in an institutional-friendly manner.

Finally, our most ambitious undertaking to date is Converge, our joint blockchain initiative with Securitize. This hybrid blockchain is designed to be the nexus where DeFi meets the needs of CeFi and TradFi. Converge aims to be a primary issuance layer for tokenised assets, integrating seamlessly with existing DeFi protocols to provide institutions with an environment to participate in the decentralised economy.

Through these offerings, Ethena Labs is not just creating new financial products; we are building the foundational infrastructure for a more open, efficient, and interconnected global financial system.

Join us!

We are looking for a Senior/Staff Security Engineer to join us on this exciting journey, ensuring the security and resilience of our platform as we continue to grow.

Location: Outside of the USA and within 5+ hours of GMT

The Role

As a Senior/Staff Security Engineer, you will be at the forefront of securing the next generation of decentralized financial technology. You will take ownership of building and maintaining our platform’s security infrastructure, working across both on-chain and off-chain components. Your work will protect our users and ensure the integrity of our systems in the rapidly evolving crypto and DeFi landscape.

This is an opportunity to make a meaningful impact by contributing to a key part of our platform. You will be involved in every layer of security, from threat modeling and incident response to developing automation tools that streamline our operations. You’ll work closely with our development, DevOps, and product teams, embedding security into the DNA of our products while staying ahead of emerging threats.

What You’ll Do

• Design, develop, and implement security architectures and features for both on-chain and off-chain components of the platform, ensuring defense against vulnerabilities and attacks.
• Identify and mitigate risks by performing threat modeling, security hardening, and vulnerability assessments across the full tech stack.
• Lead incident response efforts, acting as the primary point of contact for security incidents and coordinating with internal and external teams to resolve issues.
• Conduct regular penetration testing and forensic investigations, ensuring identified security weaknesses are addressed swiftly.
• Develop security tools and automation scripts to enhance the efficiency and effectiveness of our security operations.
• Work closely with application development and DevOps teams to integrate security best practices into every stage of the software development lifecycle.
• Stay on top of emerging security trends, threats, and technologies, contributing innovative solutions to continuously improve our security posture.

What We’re Looking For

• 5+ years of hands-on experience in a security engineering or DevSecOps role, with demonstrated expertise in full-stack software security (back-end, front-end, and DevOps).
• Proficiency in designing and implementing robust security architectures for cloud-based systems, and strong experience in securing CI/CD pipelines.
• Experience in intrusion detection, forensic investigation, and leading security incident response.
• Strong understanding of security frameworks, principles, and best practices, with a proactive approach to risk management.
• Ability to effectively communicate security requirements and concepts to both technical and non-technical stakeholders.
• Expertise in Threat Detection and Response, and Endpoint Security is highly desirable
• Experience with crypto/web3 technologies, including smart contract audits, is highly desirable.
• Bachelor’s or Master’s degree in Computer Science, Information Security, or a related field.
• Industry certifications such as CISSP, OSCP, Sec+, or similar are a plus.

$150,000 - $200,000 a year

Why Ethena Labs?

• Join a forward-thinking, crypto-native company with a mission to revolutionize decentralized finance.
• Work alongside a passionate and innovative team that values collaboration and creativity.
• Enjoy a flexible, remote-friendly work environment with opportunities for growth and learning.
• If you subscribe to the mission of separating the dollar from the state, then we want to hear from you!
• We look forward to receiving your application and will be in touch after having a chance to review.

In the meantime, here are some links to more information about Ethena Labs to help you check us out:

• Website
• Twitter
• LinkedIn

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