Lightning Developer

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 roleBitcoin 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 StackNode.js / TypeScriptPythonMongoDB, MySQL, TypesenseAmazon AWS, KubernetesWhat you'll doOwn and improve our Lightning Network and Bitcoin payment infrastructure, from everyday upgrades and fixes to to larger improvements across the stackWork hands-on with Lightning implementations (LND, CLN, or similar), payment channels, and liquidity managementAnalyze how our Lightning payments flow, including forensic work after incidents, and build monitoring and policies on topStrengthen the security of our crypto systems: key management, HSMs, and how we safeguard fundsHelp us get crypto transaction accounting right, working with the finance team so our books reflect how Bitcoin actually movesEvaluate and integrate new Bitcoin and Lightning tech as the space evolvesGet new payment protocols into production, from payjoin to nostr-based flowsBuild the Lightning side of our agentic commerce workShip with product and design, and contribute to our internal libraries and open-source toolingWhat we're looking forSeveral years building software professionally, with a track record of shipping real thingsAI is part of how you build (Claude Code, Codex, Cursor, or similar). This is non-negotiable for usDeep understanding of the Lightning Network protocol and Bitcoin fundamentalsHands-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 PythonCrypto-native. You use it, you follow where it's headed, and nobody needs to explain Bitcoin to youSelf-driven. You spot the opportunity and push it forward instead of waiting for a roadmapBonus pointsYou've contributed to open-source Lightning or Bitcoin projectsExperience with payment channel management and liquidity optimizationYou run your own nodeHands-on with newer Lightning and Layer 2 techExperience building payments at scaleWhy BitrefillWe'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.