About

Work Experience

• Full Stack Engineer, Backend Lead, Pay After Ltd

  Dec, 2024 - Mar, 20261 year 3 months

  At Pay After, a BNPL (Buy Now, Pay Later) fintech platform operating in Rwanda and Ivory Coast, I worked as a contractor on backend architecture, payment infrastructure, and frontend integration.

  • Designed a modular backend architecture with Fastify / Node.js, including a transaction ledger ensuring consistency, traceability, and integrity of financial flows

  • Built idempotent REST APIs for payments, orders, and partner management, eliminating side effects on request replay and ensuring safe retries in distributed environments

  • Implemented a Redis caching strategy (sessions, hot data) significantly reducing load on Appwrite and improving response times across high-frequency endpoints

  • Set up unit testing with Vitest and automated CI/CD pipelines via Docker and GitHub Actions, enabling reliable continuous deployment

  • Developed frontend interfaces with React, TypeScript and Tailwind CSS aligned with Figma specifications, collaborating closely with the design team

• Backend Engineer, Payment Integration, Galsenfit

  Jun, 2025 - Aug, 20252 months

  At Galsenfit, a Shopify-based e-commerce store specializing in fitness products, I designed and shipped a full mobile payment integration system enabling local payment methods in a market where no native Shopify solution existed. Now processing 120+ orders per day in production.

  • Built a Next.js / Node.js webhook-driven server intercepting Shopify order events in real time and orchestrating payment flows across three providers simultaneously

  • Secured the IPN callback surface with provider-specific cryptographic verification: HMAC signature + timestamp-based replay protection (Wave), SHA-512 hash validation (Paydunya), and signature-based validation (Orange Money)

  • Integrated Wave, Orange Money, and Paydunya APIs with IPN-based payment confirmation and automated order capture via the Shopify GraphQL API

  • Shipped to production processing 120+ orders per day across three payment providers, under real-world West African network conditions

• Full Stack Engineer, 01Edu

  Nov, 2024 - Apr, 20261 year 5 months

  At 01Edu, an innovative educational system deployed in 40+ countries training developers through peer learning and gamification, I contributed to Tournament, a competitive coding platform, within a 10-engineer team.

  • Wrote SQLite queries and built backend endpoints with Deno to support competitive tournament logic

  • Implemented real-time data streaming via Server-Sent Events (SSE) for live leaderboard updates

  • Built a reusable UI component library (Preact, TypeScript) with a strong focus on performance and load time

  • Collaborated closely with backend engineers and designers (Figma) to ship cohesive product features

• Frontend Developer, Komkom

  Apr, 2025 - Sep, 20255 months

  At Komkom, a digital platform modernizing the tontine, the traditional African collective savings system, I led the development of the landing page and an internal back office tool.

  • Developed a responsive landing page and an internal back office tool with Angular and TypeScript

  • Consumed REST APIs documented via Swagger for user data and transaction management

  • Optimized for cross-device and cross-browser compatibility

• Full Stack Developer, Yooagility

  Jun, 2023 - Oct, 20234 months

  At Yooagility, an agile consulting and training firm based in Senegal, I built their web platform from scratch.

  • Developed a Next.js (SSG) web application with TypeScript, optimized for performance and SEO

  • Integrated a headless CMS (Directus) for dynamic content management

  • Applied static rendering and caching strategies to optimize load times

Skills

Education

References