S. Yaji NONFON

About Me

I build products that genuinely simplify work.

Portrait of Yaji Nonfon, freelance developer

My Journey

I'm Yaji NONFON, a freelance developer based in Benin. My starting point is always the same: understand what wastes time, then build the simplest solution that lasts. Reliable APIs, business apps, tools that replace manual tasks: that's where I'm most useful.

This approach was shaped by real projects. I built Mp Recharge, a mobile-first financial platform with African Mobile Money integration and more than 250 active users in production. Then a complete SaaS invoicing system that I use myself every day to manage my clients.

Every project I deliver is treated as a real product: deadlines met, clean code, clear communication.

On the education side: a computer science degree at Accra Institute of Technology (Ghana), then a program at Techten Planet Ghana (Node.js, Express.js, REST APIs).

Outside of code, I experiment with ideas and build tools to make life simpler. Continuous learning matters to me.

I'm currently open to freelance work and new projects.

My Skills

Backend & APIs

Node.jsExpress.jsTypeScriptRESTSwagger

Business apps

Next.jsReactReact Native

Databases

PostgreSQLSupabase

Frontend

ReactNext.jsTailwind CSS

Automation

Mobile Money (FeeXPay)PDFIA

Software architecture

API designAudit logsRender

Professional Experience

2024 - Present

💻 Freelance Backend Developer

Self-employed.

Designing and delivering real web products for clients, from API to deployment. What I've built:

  • Mp Recharge: a mobile-first financial platform with FeeXPay integration (MTN MoMo, Moov) and more than 250 active users in production.
  • Digami Bénin: a complete corporate website.
  • SaaS invoicing system: quotes, contracts, invoices, payments and receipts, with audit logs and Swagger documentation deployed on Render.
2025

👨‍💻 Backend Developer Intern

Techtenplanet Planet.

Backend development with Node.js and Express.js: building and consuming REST APIs, server logic, databases, API architecture. Worked with the technical team to debug, test and improve features, plus Git and deployment.