Lightning Developer

Lightning Developer Build the spending layer for internet money. For real. You know Bitrefill, you've probably routed a payment through us. You get why Lightning matters and you want to build the infrastructure that makes it work for a million+ customers across 180 countries. If that's you, hit the apply button and let's talk. If you need more info to decide, keep reading. We kept the corporate fluff out, so it won't take long. About the role Bitcoin and Lightning are where Bitrefill comes from, and they're still core to what we do. There's more happening in this space than the team can keep up with, so we're bringing in more hands to keep things running and push them forward: shipping the integrations we keep talking about, digging into how our payments actually flow, and turning "we should really do this" into things that are live. Our Tech Stack Node.js / TypeScript Python MongoDB, MySQL, Typesense Amazon AWS, Kubernetes What you'll do Own and improve our Lightning Network and Bitcoin payment infrastructure, from everyday upgrades and fixes to to larger improvements across the stack Work hands-on with Lightning implementations (LND, CLN, or similar), payment channels, and liquidity management Analyze how our Lightning payments flow, including forensic work after incidents, and build monitoring and policies on top Strengthen the security of our crypto systems: key management, HSMs, and how we safeguard funds Help us get crypto transaction accounting right, working with the finance team so our books reflect how Bitcoin actually moves Evaluate and integrate new Bitcoin and Lightning tech as the space evolves Get new payment protocols into production, from payjoin to nostr-based flows Build the Lightning side of our agentic commerce work Ship with product and design, and contribute to our internal libraries and open-source tooling What we're looking for Several years building software professionally, with a track record of shipping real things AI is part of how you build (Claude Code, Codex, Cursor, or similar). This is non-negotiable for us Deep understanding of the Lightning Network protocol and Bitcoin fundamentals Hands-on experience with at least one Lightning implementation (LND, CLN, Eclair, or LDK) Strong with our backend stack, Node.js and TypeScript, and comfortable working in Python Crypto-native. You use it, you follow where it's headed, and nobody needs to explain Bitcoin to you Self-driven. You spot the opportunity and push it forward instead of waiting for a roadmap Bonus points You've contributed to open-source Lightning or Bitcoin projects Experience with payment channel management and liquidity optimization You run your own node Hands-on with newer Lightning and Layer 2 tech Experience building payments at scale Why Bitrefill We've been quietly right about something since 2014: internet money should just work. Fully remote since day one. Team across 30+ countries. Get paid in crypto if you want. No bullshit meetings. Twice a year we meet up to build together in person. The rest of the time: work hard, get shit done. Team Product team Locations Remote Remote status Fully Remote Employment type Full-time Workplace & Culture Wherever in the world you are, you are welcome to break rules, get sh*t done, and have fun with us! About Bitrefill We have been turning internet money into real stuff since 2014. Used in 180+ countries by 1M+ customers.