Senior Bitcoin Lightning Engineer

OPEN TO CANDIDATES WORLDWIDE!
About the company
Our client is building a DePIN (Decentralized Physical Infrastructure Network) for IoT connectivity. Its hardware nodes run OpenWrt-based routers that host the network ledger and support LoRa, Wi-Fi HaLow, Zigbee, NB-IoT and LTE. The team is adding a Bitcoin Lightning payment layer to the ecosystem and building its own branded Lightning wallet on the open-source RaspiBlitz project.
The role
You’ll own the client’s Lightning wallet end to end, from a scoped rebrand to a custom product integrated with the client’s network. This is a long-term role. Phase 1 is where you and the client confirm the fit.
Phase 1: Rebrand (approx. 3–4 weeks)
Fork and configure the raspiblitz-web repository
Apply the client’s brand identity (logos, colors, typography)
Rename the “Satoshi” unit to the client’s branded unit in labels and display logic
Ensure the UI is consistent and responsive on desktop and mobile
Phase 2: Custom wallet features
Design and build wallet features specific to the client’s ecosystem
Extend the backend (blitz_api) and Lightning node interactions as needed
Work with the in-house designer and the existing team in Canada and India
Phase 3: Network integration
Integrate the wallet’s Lightning payments with the client’s DePIN network and node infrastructure
Collaborate with the hardware/firmware team on how payments connect to OpenWrt-based nodes and the network ledger
Must-have
5+ years of software development, with strong TypeScript and React
Hands-on experience with Bitcoin and the Lightning Network: channels, liquidity, invoices, payments, and how a node relates to a wallet
Experience building against LND or Core Lightning APIs (gRPC/REST)
Backend development experience, ideally Python (FastAPI)
Comfortable with Git/GitHub workflows, including forking and maintaining upstream open-source projects
Able to read an unfamiliar codebase and give accurate hour estimates for scoped work
Strong plus
Built or contributed to a Bitcoin/Lightning wallet or node interface (RaspiBlitz, RTL, ThunderHub, Umbrel, Zeus, BTCPay Server, StartOS)
Experience with Linux-based or embedded environments (OpenWrt a bonus)
Exposure to IoT or DePIN projects
UI/design sensibility
Engagement details
25+ hours/week, initial 3-month contract with long-term intent
Remote, any location

Work arrangement
Yes