Projects

A selection of the things I have built. Each card links to the live website and, when the project is open source, to its source code.

• 

  Grimm App

  A self-custodial Bitcoin wallet for everyday payments. Send and receive over the Lightning Network in seconds, keep your own keys, and restore from an encrypted local backup. Built on the Breez SDK and shipped on both the App Store and Google Play.

  • React Native
  • TypeScript
  • Bitcoin
  • Lightning Network
  • Breez SDK
  • BDK

  Website Source code
• 

  Grimm Point

  Bill payments for Cameroon settled in Bitcoin Lightning: airtime, mobile data, ENEO electricity and TV subscriptions, paid from any Lightning wallet in a few seconds. Non-custodial by design — the platform never holds user funds.

  • Next.js
  • TypeScript
  • Bitcoin
  • Lightning Network
  • MTN & Orange

  Website
• 

  Kivoo

  An online store builder for African creators. Sell digital files, courses, services or physical products, get paid in FCFA through MTN and Orange Mobile Money, and let buyers receive their download by email as soon as the payment clears. No subscription — a 10% commission per sale.

  • Next.js
  • TypeScript
  • Mobile Money
  • E-commerce
  • Analytics

  Website
• 

  Stablecoin Payment Gateway

  A Rust microservice for accepting USDT deposits. It derives a fresh HD address per payment, watches Tron, Ethereum and Solana for the incoming transfer, and delivers pending / paid / expired webhooks with retries. Comes with a React admin dashboard for payments, API keys, webhook monitoring and staff management.

  • Rust
  • PostgreSQL
  • Redis
  • React
  • Docker
  • Web3

  Source code