Land your dream remote job

Solana Foundation is looking to hire a Developer Relations Advocate to join their team. This is a full-time position that can be done remotely anywhere in the United States.

Lightning Labs is looking to hire a Lightning Developer Evangelist to join their team. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Blast is looking to hire a Chief of Staff to join their team. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Lightning Labs is looking to hire a Lightning Infrastructure Engineer to join their team. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Axiom is looking to hire a ZK Proof Engineer to join their team. This is a full-time position that can be done remotely anywhere in the United States or on-site in New York NY.

Polygon is looking to hire a Developer Evangelist - DeFi to join their team. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Argus is looking to hire a Software Engineer (Junior/Fresh Graduate) to join their team. This is a full-time position that can be done remotely anywhere in Indonesia.

Solana Foundation is looking to hire a Technical Project Manager, Ecosystem to join their team. This is a full-time position that can be done remotely anywhere in the United States.

0x is looking to hire a Senior Design Engineer, Matcha to join their team. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

The mission of Speechify is to make sure that reading is never a barrier to learning.

Over 50 million people use Speechify’s text-to-speech products to turn whatever they’re reading – PDFs, books, Google Docs, news articles, websites – into audio, so they can read faster, read more, and remember more. Speechify’s text-to-speech reading products include its iOS app, Android App, Mac App, Chrome Extension, and Web App. Google recently named Speechify the Chrome Extension of the Year and Apple named Speechify its 2025 Design Award winner for Inclusivity.  

Today, nearly 200 people around the globe work on Speechify in a 100% distributed setting – Speechify has no office. These include frontend and backend engineers, AI research scientists, and others from Amazon, Microsoft, and Google, leading PhD programs like Stanford, high growth startups like Stripe, Vercel, Bolt, and many founders of their own companies.

Overview

We're looking to hire for our Data side of our AI team at Speechify. This role is responsible for all aspects of data collection to support our model training operations. We are able to build high-quality datasets at petabyte-scale and low cost through a tight integration of infrastructure, engineering, and research work. We are looking for a skilled Software Engineer to join us.

What You’ll Do

• Be scrappy to find new sources of audio data and bring it into our ingestion pipeline
• Operate and extend the cloud infrastructure for our ingestion pipeline, currently running on GCP and managed with Terraform.
• Collaborate closely with our Scientists to shift the cost/throughput/quality frontier, delivering richer data at bigger scale and lower cost to power our next-generation models.
• Collaborate with others on the AI Team and Speechify Leadership to craft the AI Team’s dataset roadmap to power Speechify’s next-generation consumer and enterprise products.

An Ideal Candidate Should Have

• BS/MS/PhD in Computer Science or a related field.
• 5+ years of industry experience in software development.
• Proficiency with bash/Python scripting in Linux environments
• Proficiency in Docker and Infrastructure-as-Code concepts and professional experience with at least one major Cloud Provider (we use GCP)
• Experience with web crawlers, large-scale data processing workflows is a plus
• Ability to handle multiple tasks and adapt to changing priorities.
• Strong communication skills, both written and verbal.

Salary and compensation

Binance is looking to hire a Binance Accelerator Program - QA Engineer to join their team. This is a full-time position that can be done remotely anywhere in Asia or on-site in Dubai.

Mural is hiring a remote Senior AI Engineer, Data Engineering. This is a full-time position that can be done remotely anywhere in Argentina.

Mural - Online brainstorming, synthesis and collaboration.

DuckDuckGo is hiring a remote Senior Android Engineer. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

DuckDuckGo - Smarter search without the tracking.

Elevate Labs is hiring a remote Senior Backend Engineer. This is a full-time position that can be done remotely anywhere in North America or South America.

Elevate Labs - Discover your mind's limitless potential.

RevenueCat is hiring a remote Senior Backend Engineer, Web. This is a full-time position that can be done remotely anywhere in Americas or EMEA.

RevenueCat - The better way to build and manage subscription apps.

Mural is hiring a remote Senior Software Engineer, eCommerce. This is a full-time position that can be done remotely anywhere in Argentina.

Mural - Online brainstorming, synthesis and collaboration.

Eight Sleep is hiring a remote Senior Backend Engineer. This is a full-time position that can be done remotely anywhere in the United States.

Eight Sleep - The sleep fitness company.

Modern Treasury is hiring a remote Software Engineer - Payments. This is a full-time position that can be done remotely anywhere in the United States.

Modern Treasury - Payment operations solutions that automate the full cycle of money movement.

DuckDuckGo is hiring a remote Senior Software Engineer, Windows Desktop App. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

DuckDuckGo - Smarter search without the tracking.

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

Astronomer - Modern data orchestration.

Awesome Motive is hiring a remote QA Team Lead. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Awesome Motive - Helping small businesses grow & compete with the big guys.

Mozilla is hiring a remote Sr Staff Machine Learning Engineer, GenAI. This is a full-time position that can be done remotely anywhere in Canada or the United States.

Mozilla - Non-profit champions of the Internet.

RevenueCat is hiring a remote Senior Data Engineer. This is a full-time position that can be done remotely anywhere in Americas or EMEA.

RevenueCat - The better way to build and manage subscription apps.

About Oku

At Oku, we aim to close the gap between the CeFi and DeFi trading experiences. It is no mistake that 95% of crypto trading occurs on centralized platforms like Binance and Coinbase since their organizations have spent substantially more time and resources investing in their trading interface, while DeFi has primarily been focused on infrastructure and protocols for the last several years.

However, that is going to change soon. While CeFi organizations enjoy their Web2 stack, a Web3 company like Oku can leverage the composability of the DeFi ecosystem and blockchain technology to offer a high-quality trading experience that will eventually be indistinguishable from CeFi and, in the long run, overcome their legacy systems. That is why Oku has 50+ partners in or supporting the app.

Oku initially started as a project within GFX Labs after they received a $1.6M grant from the Uniswap Foundation in October 2022 to build and launch a reimagined trading interface, analytics platform, and API for Uniswap v3. After ten months of development, Oku launched in July 2023, and since then, Oku has supported the DAO Uniswap’s efforts to expand across new blockchains.

Today, our primary feature is our smart order routing system, which integrates 12+ order routing systems to ensure all users find the best price possible. We have also adapted our order routing technology to offer a bridge aggregator with 11+ integrated bridges. Most recently, to close the CeFi/DeFi gap further, we added on/off-ramping with USD and EURO to our interface at an industry-low fee of free! Our other popular features include trustless onchain limit orders built directly on Uniswap v3, our position manager page for users who want to manage their LP positions, and our Uniswap v3 analytics.

Over the coming years, Oku will be expanding the scope of our offering and improving the quality of our user experience.

Why work at Oku?

• Any firm can pay a high salary and offer good incentives (as will we), but most can’t offer interesting, challenging, and rewarding work.
• We have something to prove. Our team is young and hungry. We like to move fast and make things. We know when to double down and when to cut our losses. We are going to make mistakes, and we are going to build a better product because of them. We don’t micromanage or have a huge team of product managers. We want self starters who take charge and solve problems.
• We don’t care if you went to school, what grades you got, or your age. Show us what you have built, what problems you have solved, and what skills you have.

About the role

As a Web3 Frontend Engineer at Oku, you’ll be handling web3 data and functions to bring them neatly into Oku. You will work closely with the entire team, but particularly our product designers and the other frontend engineers.

Key Responsibilities

• Implement responsive user interfaces using React and other modern web tooling
• Write clean, maintainable code following team standards and best practices
• Collaborate with senior engineers to integrate wallet connectivity and on-chain interaction.
• Assist in testing and debugging
• Learn and apply blockchain development concepts to improve the user experience for users

You might be great for this role if you have

• Experience in Web3 frontend engineering.
• Personally use DeFi EVM protocols regularly.
• Attention to detail with excellent organizational and communication skills.
• Thrive in an environment where you have significant independence.
• You are proactive and driven by curiosity.
• You have a strong work ethic with disciplined execution skills.
• Keen to leverage AI to make you as productive as possible.

What you’ll do at Oku

• Develop top-tier user experiences with DeFi protocols across an array of blockchains
• Create smooth, pixel-fit experiences for customers
• Partner with design on UX strategy
• Build an engineering culture that attracts the most talented people to join us

We’d love to hear from you if…

• You love tackling ambitious projects with the ability to change DeFi as we know it
• You care about all aspects of customer experience
• You can see things from a high level, and e into the details with equal confidence
• You think DeFi can improve day-to-day financial tooling

… and you really care about these details

• You want to create brand new experiences
• You can operate autonomously
• You are pro-active and are driven by curiosity
• You can build robust systems on both web and native platforms
• You can handle complexity, but prefer simplicity

Tools we are using today

• React, Figma, Tailwind, Joita, React-Query
• Golang, NodeJS
• PostgreSQL, Temporal, NATS, Clickhouse
• Linear and Gitlab
• DigitalOcean, fly.io, Kubernetes, KNative, Pulumi, Terraform
• Claude Code and many more AI tools

Logos tech stack, a movement supporting the development of the decentralised web. Logos technologies lay the foundations for a freer internet upon which communities can evolve into network states. Each protocol in the Logos stack seeks to empower its users while upholding civil liberties and fundamental freedoms.

As a p2p messaging protocol, born from the original Web3 vision, Waku is a decentralised, censorship-resistant, privacy-preserving communication network that enables anyone to message, interact, collaborate, and coordinate without worrying about surveillance or deplatforming.

We are a cypherpunk group, looking for other builders to join a principle-first organisation and build truly decentralised software.

More about us:

• https://waku.org/
• https://github.com/waku-org/
• https://discord.waku.org/
• https://forum.vac.dev/
• Logos Manifesto

Responsibilities:

• Implement open protocols for peer-to-peer secure messaging.
• Maintain Golang, Rust and other language SDKs built on top of FFI bindings.
• Create and maintain a sustainable and fault-tolerant distributed system.
• Write and maintain Nim code (nwaku codebase).
• Understand and optimise the core functionality of complex software systems.
• Provide feedback on overall design decisions, and participate in code reviews.
• Use libp2p to build infrastructure-level protocols.
• Support platforms and operators using nwaku software.

Ideally, you have

• A passion for privacy-preserving, decentralised and blockchain technology.
• At least 4 years of software engineering experience, with low-level/strongly typed languages (C/C++/Go/Rust).
• Experience delivering native multi-platform SDKs for external developers.
• Familiarity with message propagation in loosely connected networks.
• Familiar with p2p building blocks such as gossiping, routing and discovery (DHTs), and Nat traversal.

Bonus points if you have experience in:

• Experience building networking-heavy applications and p2p networking specifically.
• Contributed to a blockchain-related, open-source project.
• Experience with Valgrind, or gdb, or gprof or perf.
• Experience with off-the-shelf networking stacks such as libp2p.

Compensation:

We are happy to pay in a mix of fiat and/or crypto. For more information regarding contributing to IFT: https://contributors.free.technology/

Hiring process:

1. Introduction call with People Ops team
2. Pair programming session with nwaku team member
3. Technical & Culture Interview with nwaku team lead
4. Interview with Waku lead

The steps may change along the way if we see it makes sense to adapt the interview stages, so please consider the above as a guideline.

Tenderly is looking to hire a Frontend Engineer to join their team. This is a full-time position that can be done remotely anywhere in Remote or on-site in Belgrade.

Launch your WordPress career at Melapress and help us build secure, high-impact products and a great web presence.

Would you like to turn your love for WordPress into production-ready code? Do you want to learn from senior engineers who maintain plugins that run on hundreds of thousands of sites? If so, we’d love to hear from you.

At Melapress, we develop security-focused plugins such as WP Activity Log and WP 2FA, and we run multiple in-house properties, including our own website – Melapress.com, on WordPress. We’re searching for a WordPress Plugins & Themes Developer with focus on DevOps to join our fully remote team and grow alongside our senior engineers.

About Melapress

Melapress is a remote software startup that develops several WordPress security, user management, and administration plugins. Our plugins are installed on more than 400,000 websites and help website administrators and managers improve the security of their websites and better manage them and their users.

What you will be doing

As a WordPress plugins & themes developer, you will:

• Theme work: Help develop and maintain the custom theme powering Melapress.com (block editor, performance, accessibility).
• Integrations & DevOps: Create API-driven integrations with services such as MailerLite, Freemius, plugins such as Easy Digital Downloads, and our internal reporting tools.
• Plugin work: Build and refine new features for all our plugins, including Melapress Login Security and Melapress Role Editor.
• Collaboration: Collaborate with the support and product team to troubleshoot and fix bugs in the existing codebase.
• Learning & documentation: Develop and maintain comprehensive documentation for all the projects you work on.

By working in a small but fast-growing team, other responsibilities (and development opportunities) may come along from time to time.

Skills and experience

• 1–2 years of hands-on WordPress development (plugins and/or themes).
• Solid grasp of PHP, JavaScript (ES6+), CSS/Sass, and MySQL.
• Familiarity with WordPress hooks, actions & filters, REST API, and block editor basics.
• Comfortable with Git, command-line workflows, and local/staging environments.
• Experience building and working with RESTful APIs and handling JSON/XML and other data formats.
• Basic understanding of DevOps concepts (CI pipelines, Composer, WP-CLI, caching).
• Comfortable working in a remote team and capable of working independently.
• Strong communication skills and proficiency in English communication.

Nice to have…

• Recognized author profile in the WordPress space.
• Interest in web security, test automation, or performance profiling.

What we offer

• Competitive salary or rates based on experience.
• The opportunity to work on widely used WordPress security products.
• A small, friendly team where your contributions have a real impact.
• Opportunities to experiment with AI and other cutting-edge tools.

Salary and compensation

Benefits

🌎 Distributed team

🏖 Paid time off

🏔 Company retreats

🖥 Home office budget

👀 No monitoring system

🚫 No politics at work

Smartling is hiring a remote Sr.Linguistic Engineer. This is a full-time position that can be done remotely anywhere in Europe.

Smartling - Translation management platform to localize your content across devices and platforms.

Bitwarden is hiring a remote Technical Writer. 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.

Zipline is hiring a remote Customer Success Engineer. This is a full-time position that can be done remotely anywhere in Canada or the United States.

Zipline - Helping retailers streamline communications and employee engagement.

GitLab is hiring a remote Senior Analytics Engineer. This is a full-time position that can be done remotely anywhere in the United States.

GitLab - A single application for the entire DevOps lifecycle.

Private.Ki is searching for a Content Producer / Technical Content Engineer / Junior Developer who can turn cryptography tech into clear, compelling stories. From quick‑hit support articles to deep‑e knowledge‑base docs and buzz‑worthy blog posts, you’ll own every word that helps users master our privacy‑first email and messaging platform.

We’re a fully funded, 100 % remote startup, shipping game‑changing encryption features at startup speed. Join our worldwide crew and write from anywhere!

✅ Full‑time position (part-time possible) | Fully remote | Long‑term contract

Why Join Us?

• Fully Remote: Work from anywhere, no commute required.
• Startup Pace: Fast‑moving, no bureaucracy, real impact.
• Cutting‑Edge Tech: Shape how users learn about privacy‑first email, PGP, and our end‑to‑end encrypted stack.
• Tight‑knit Crew: Collaborate with world‑class engineers & designers across multiple countries

Your Mission

Own every written touch‑point that helps users succeed with Private.Ki:

• Support Docs: crisp “how‑to” answers, step‑by‑step walkthroughs, annotated screenshots.
• Knowledge‑Base: deeper es into OPAQUE login, OpenPGP.js, threat models and security architecture.
• Blog & Social: catchy stories, release notes, Medium articles, X threads - anything that sparks curiosity about privacy tech.
• Content Ops: pick the topics, draft, edit, publish, measure, iterate. No hand‑holding required.

Must‑Have Responsibilities

• Translate complex crypto concepts into clear, engaging copy.
• Spin up demo environments, capture screenshots/GIFs, and embed code snippets.
• Maintain information architecture so users find answers fast.
• Partner daily with engineers, QA and design to stay ahead of product changes.
• Speak and write fluent English - tone can shift from friendly support to technical deep‑e.

Required Skills

• Solid grasp of modern web / mobile stacks (React Native, TypeScript, REST, WebView): Maybe you're a junior developer?
• Deep use of AI to speed up your process.
• Markdown mastery; comfortable with git‑based content workflows.

Nice‑to‑Haves

• Familiarity with PGP, OPAQUE, or similar encryption protocols, or ability to quickly adapt these
• Hands‑on coding ability (you can read the repo and maybe fix a typo).
• Experience automating docs generation or building interactive tutorials.
• SEO fundamentals & analytics mindset.
• Basic video editing for quick explainer clips.
• Side‑projects or blog posts that prove you love teaching tech.

Working Conditions

• Fully remote & async‑friendly.
• Flexible schedule, 40 h/week minimum (or part-time, if you prefer).
• No monitoring software, no office politics - just ship great work.

Bonuses

• Distributed, inclusive team.
• Hardware stipend.
• Freedom to open‑source tooling you create along the way.

Sound good? Let’s chat. DM us on X (@PrivateKi) or drop a line to [email protected] - include links to anything you’ve written or built that shows you can write.

Salary and compensation

"

The FutureClinic Mission

Healthcare is a broken system. It’s the most important thing in anyone’s life, but the ability to both deliver and receive healthcare has been artificially constrained in a brick and mortar system of hospitals and clinics that charge predatory prices, increase administrative bloat, and create barriers between doctors and patients.

This has left doctors disgruntled, with 40% of doctors in the U.S. planning to leave their jobs in the next 5 years. It’s also left patients lost — rationing when they seek care and sacrificing their overall health.

With FutureClinic, we’re building a completely new category of care. Chat-based healthcare. Asynchronous by design, available from anywhere, and mediated by AI assistants who handle data gathering to make the system infinitely more scalable than current healthcare delivery.

We want to make expert, personalized healthcare accessible to 8 billion people in the world. The FutureClinic platform empowers inidual doctors to launch their own chat-based clinic and offer direct subscription based care to patients. With this model, we can change the way healthcare is delivered for good. In 5 years, everyone will start their healthcare journey with any new symptom by speaking directly to the doctors they’ve chosen through the FutureClinic app. They’ll only ever seek in person care when it’s truly necessary, not as a default first option.

Join us in bringing that vision to reality, and work on the most meaningful problem in the world — making access to healthcare ubiquitous.

TLDR:

FutureClinic is a YC‑backed (F24) healthcare‑AI startup that empowers any physician to launch a fully compliant, chat‑based digital clinic in days. Patients subscribe to their chosen doctor for a flat monthly fee and can reach out whenever health questions arise—no scheduling, no waiting rooms.

About Us

* Funding: $5 M seed at a $40 M valuation (January 2025).

Our Current Stack

* TypeScript / Node / Hono in a PNPM monorepo, sharing types across workspaces

What You’ll Do

1. Design, secure, and scale the core APIs so thousands of concurrent doctor-patient chats run with high availability and HIPAA-grade protection.

You Might Be a Fit If You…

* Have 5+ years designing, building, and running production software with Node and TypeScript

Nice‑to‑Haves

* Experience with LLM inference at scale

Why FutureClinic

* Direct impact: Your code will help doctors care for patients the same week it’s written.

",

"

The FutureClinic Mission

Healthcare is a broken system. It’s the most important thing in anyone’s life, but the ability to both deliver and receive healthcare has been artificially constrained in a brick and mortar system of hospitals and clinics that charge predatory prices, increase administrative bloat, and create barriers between doctors and patients.

This has left doctors disgruntled, with 40% of doctors in the U.S. planning to leave their jobs in the next 5 years. It’s also left patients lost — rationing when they seek care and sacrificing their overall health.

With FutureClinic, we’re building a completely new category of care. Chat-based healthcare. Asynchronous by design, available from anywhere, and mediated by AI assistants who handle data gathering to make the system infinitely more scalable than current healthcare delivery.

We want to make expert, personalized healthcare accessible to 8 billion people in the world. The FutureClinic platform empowers inidual doctors to launch their own chat-based clinic and offer direct subscription based care to patients. With this model, we can change the way healthcare is delivered for good. In 5 years, everyone will start their healthcare journey with any new symptom by speaking directly to the doctors they’ve chosen through the FutureClinic app. They’ll only ever seek in person care when it’s truly necessary, not as a default first option.

Join us in bringing that vision to reality, and work on the most meaningful problem in the world — making access to healthcare ubiquitous.

TLDR:

FutureClinic is a YC‑backed (F24) healthcare‑AI startup that empowers any physician to launch a fully compliant, chat‑based digital clinic in days. Patients subscribe to their chosen doctor for a flat monthly fee and can reach out whenever health questions arise—no scheduling, no waiting rooms.

About Us

* Funding: $5 M seed at a $40 M valuation (January 2025).

Our Current Stack

* React with TypeScript powers all of our web-based experiences, including:* Patient onboarding flows

What You’ll Do

1. Own the mobile experience end‑to‑end in Expo (iOS, Android).

You Might Be a Fit If You…

* Have 2+ years of hands-on experience with React Native (Expo bare & managed), React on the web and TypeScript.

Nice‑to‑Haves

* Experience with building real time chat applications.

Why FutureClinic

* Direct impact: Your code will help doctors care for patients the same week it’s written.

",

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

Aha! is hiring a remote Sr. Ruby on Rails Engineer (Frameworks). This is a full-time position that can be done remotely anywhere in New Zealand, North America or South America.

Aha! - The world's #1 product development software.

Sahara AI is looking to hire a Senior Machine Learning Engineer to join their team. This is a full-time position that can be done remotely anywhere in the United States.

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

Zoom - Modern enterprise video communications.

Figma is hiring a remote Web Developer. This is a full-time position that can be done remotely anywhere in the United States.

Figma - A design platform for teams who build products together.

"

The Role

We're seeking a Forward Deployed Engineer to work directly with customers, helping them integrate Plexe and build complete ML pipelines using our platform. You'll be part technical consultant, part solutions architect, and part implementation partner—traveling to customer sites, understanding their unique challenges, and ensuring they achieve success with our ML Engineering platform. If you love solving complex problems in real-world environments and thrive on customer interaction, this role is for you.

What You'll Do

* Customer Engagement: Visit customer sites to understand their ML workflows, pain points, and business objectives. You'll be the technical face of Plexe, building relationships and trust with engineering teams.

What We Need

We're looking for someone who combines strong technical skills with excellent customer-facing abilities:

* 3+ years building and deploying ML systems in production environments

Nice-to-Have:

* Background in consulting or customer success roles

Why This Role?

This isn't your typical engineering position - you'll have direct impact on customer success while working with cutting-edge AI technology. You'll see firsthand how your work transforms businesses, build deep relationships with customers, and help shape the future of ML pipeline development.

Travel: This role involves 30-50% travel to customer sites, with opportunities to work with companies across various industries and scales.

Ready to be the bridge between innovative AI technology and real-world customer success? Let's talk.

",

Automattic is hiring a remote Senior Systems Engineer. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Automattic - We are passionate about making the web a better place.

Grafana Labs is hiring a remote Technical Support Engineer | Australia. This is a full-time position that can be done remotely anywhere in Australia.

Grafana Labs - Composable and open source observability platform.

Mural is hiring a remote Senior AI Engineer, Data Engineering. This is a full-time position that can be done remotely anywhere in Argentina.

Mural - Online brainstorming, synthesis and collaboration.

OP Labs is looking to hire a Security Engineer to join their team. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

We’re seeking a highly skilled Senior/Staff Backend Engineer passionate about solving complex problems and motivated to shape the MEV landscape on Monad with high-performance solutions. In this role, you will help design, build, and optimize MEV-related infrastructure, with a focus on block building, transaction ordering, and low-latency execution strategies etc. You’ll work on systems at the intersection of blockchain, trading, and networking, helping to advance the frontier of MEV innovation.

What You’ll Do

• Design and implement performance-critical backend systems for MEV infrastructure throughout the transaction lifecycle.
• Contribute to the development of infrastructure for validator-client integration, relay communication, and block propagation.
• Optimize code for latency, throughput, and reliability in adversarial network conditions.
• Stay informed about MEV developments in Ethereum, Solana, and other ecosystems

What We’re Looking For

• 4-10 years of backend programming experience with expertise in low-level languages like C++ and Rust (experience in both is a plus, but not required).
• Proven backend engineering experience in MEV infrastructure, trading/searching, or block-building organizations.
• Experience designing production-grade, low-latency, high-performance networking architecture and distributed systems.
• Proven track record of technical leadership and project ownership from start to finish.
• Ability to work autonomously in a fast-paced, collaborative remote environment with strong ownership.

Nice to Have

• Familiarity with blockchain internals and validator client behavior.
• Contributions to open-source MEV infra or tooling projects.
• Experience in performance tuning and networking stack optimization.
• HFT experience.
• Academic background from a top-tier university and/or experience at a well-regarded technology company

Why Join Us

Work at the frontier of crypto and DeFi infrastructure Join a tight-knit, low-ego team with deep technical chops Competitive compensation, bonus and token upside Fully remote, flexible work culture

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 Ruby & React Position

• 4+ years of software development experience.
• 3+ years of commercial experience with React.js, Ruby, and Ruby on Rails.
• Experience with Next.js is a strong plus.

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.

Senior Node & React Position

• 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, UI/UX Design, 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.

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Background

Sepal AI equips the world’s most ambitious AI teams with expert-grounded data, enabling faster, safer, and more responsible AI deployment. Trusted by leading research labs and global enterprises, Sepal AI builds at the frontier of intelligence by bridging exceptional human expertise with cutting-edge AI.

We’ve built the largest global talent graph and tooling to deliver proprietary training datasets and reinforcement learning environments that improve models. Relied on by top labs and enterprises, our platform drives innovation for researchers while upholding the highest standards of quality, clarity, and trust.

Sepal AI was founded in 2024 by engineers + operators from Vercel + Turing. In less than a year, we’ve closed several fortune 500s + top AI research labs as customers.

Responsibilities

As a software engineer, you’ll develop innovative full-stack applications and AI-enabled tooling that helps us scale our talent pool and data operations. You’ll be instrumental in enabling our customers - industry leaders and top AI research labs - to build, test, and evaluate their newest most powerful models with unparalleled precision, speed, and safety. You should be ready to build quickly.

Who we’re looking for

* 3+ years of professional experience writing code and shipping products quickly end-to-end.

Bonus points if you have

* Experience with Reinforcement Learning Environments

Why Sepal AI?

* Join a rapidly growing company at the forefront of the AI frontier, partnered with the world’s top research labs and enterprise AI teams.

Technology

* We use Typescript/Fastify, Python, TRPC, NextJS, and PostgreSQL in a monorepo. We prefer you have experience with at least one of these technologies.

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PicnicHealth is simplifying clinical research with AI, making it faster and cheaper to get new treatments to patients. We’re bringing a patient-centered, AI-first approach to a $100b market otherwise dominated by old-school, services-driven incumbents.  We’re creating a streamlined operating system for clinical research, built on top of our AI for medical record data in trials and a personal health assistant that keeps patients engaged (NPS 76). 

Founded in 2014, PicnicHealth has raised over $100 million from investors including YC, Amplify Partners, Felicis Ventures and B Capital Group. Our business running observational studies more than doubled last year and we expect to grow even faster this year.  We've gained real traction in a conservative industry: 12 of the top 20 pharma companies use PicnicHealth, we've got 60+ publications across 40 disease areas, and we just had our first FDA approval that included our data in the submission.

The Opportunity

As our first AI Tools Engineer, your mission is to enable PicnicHealth to operate dramatically more effectively with AI. You’ll identify promising AI tools, quickly prototype integrations, build robust yet lightweight workflows, and ensure these tools reliably enhance day-to-day work across every function. Your success will be measured by how effectively your teammates adopt these tools, automate routine tasks, and focus their energy on high-value work.

What You’ll Do

* Discover, test, and deploy AI SaaS products : Rapidly evaluate tools and roll out those that provide immediate impact.

You’ll Thrive in This Role If You:

* Have a CS background or equivalent experience with demonstrated ability to ship practical, functional projects quickly.

Nice-to-haves: Hackathon background, experience with Retool (or similar low/no-code tools), knowledge of vector databases, comfort with regulated data environments.

We expect all team members to be amazing in their roles and, ultimately, to move the PicnicHealth mission forward.

What is clinical research and why will PicnicHealth win?

Clinical research is the industry responsible for conducting studies to evaluate the effectiveness of drugs and treatments. Better trials lead to faster, more cost-effective drug development, ultimately resulting in more and improved treatments for patients. However, the process remains highly inefficient. Trials are a major bottleneck in drug development, and the promising advancements in biotech cannot achieve their full potential unless clinical research becomes more effective

The industry runs on outdated technology and manual processes. Research sites (hospitals, academic centers, doctors' offices) are a major bottleneck, and contract research organizations (CROs) spend most of their time wrangling sites and cobbling together vendor software. 

PicnicHealth has built technology that uniquely positions us to run faster, cheaper, and more flexible studies without requiring sites:

* PicnicAI (trained on 350M+ clinician annotations over 100k+ patient records) is the only system that can effectively access and structure all participant EMR data trials need

The other perks & benefits you get when you work at PicnicHealth

We pay competitive salaries. Everyone on the team is an owner: all full time employees get competitive equity.

Target Base Salary Range: $120K – $150K 

The base salary PicnicHealth offers may vary depending upon the scope, complexity, and autonomy of the position and on the candidate’s job-related knowledge, skills, and experience.

We’re a remote first company, with teammates spread across the US. We support in-person gatherings, including co-working spaces and multi-day onsites, to build connections and move forward strategic initiatives. Expect to travel 2-4 times a year.  For our team members in the Bay Area, who prefer to work in person we can offer a hybrid set up to work from the SF office on a flexible schedule.

You also get:

* Comprehensive benefits including above market Health, Dental, Vision

PicnicHealth is committed to promoting an inclusive work environment free of discrimination and harassment. We value a erse and balanced team where everyone can belong. 

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