Senior Bitcoin Lightning Engineer (Full-Stack) - PT - WW

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