Kodjo Jean-Gaël Ameganvi

Freelance Fullstack & AI Developer
Lomé, Togo (GMT+0) · available for remote missions

I design, build and ship complete applications, from API to interface, with AI as an everyday tool.
Python, TypeScript, Java: five years on production systems in telecoms, healthcare and HR.

What I'm working on

Mr Wallet is a personal finance app used by about 200 people. It is free, ad-free and open source (AGPL-3.0). You bring your accounts together, import statements (CSV/Excel), track budgets and debts, forecast cash flow, and every action lands in a timestamped audit log. Built with Next.js, NestJS and PostgreSQL in a TypeScript monorepo, designed and developed with AI assistants. A mobile app (Expo, offline-first) and a conversational AI financial assistant are in progress.

Projects

Project	What it does	Stack
Mr Wallet	Personal finance PWA: accounts, budgets, debts, forecasts, audit log. Bilingual FR/EN.	Next.js, NestJS, PostgreSQL, Prisma
AutoMaintainer	GitHub App on the Marketplace. Turns TODO comments into issues and labels pull requests.	TypeScript, Probot, Docker
SecurePasswordCrypt	.NET library for AES-GCM encryption and password hashing, so secrets never sit in plain text. NuGet package, MIT.	C#, .NET
Dodzi	Anti-scam assistant that explains why a WhatsApp, SMS or Telegram message looks fraudulent, in French, Ewe/Mina and pidgin. Specification complete, build starting.	Kotlin, Python, FastAPI
Cagnotte	REST API for online fundraising pools among friends and colleagues, with JWT, roles and rate limiting. Swagger docs.	Java 17, Spring Boot 3
Timesheet	Multi-client, multi-project time tracking with a browser extension and invoicing export.	Next.js 15, Supabase
fastapi-boilerplate	Layered FastAPI starter with JWT refresh tokens, migrations, tests and Docker.	FastAPI, SQLAlchemy

More in Grey-Workers-Togo and in my repositories.

How I work

• Backend first. APIs in FastAPI, NestJS and Spring Boot, with Next.js, React or Angular on the front.
• Data and platform. Spark pipelines over 100 million records a day, real-time dashboards (Grafana, ELK), SSO with Keycloak and CI/CD on GitHub Actions.
• AI in the loop. Claude Code, GitHub Copilot and Cursor every day, plus LLM integration (structured extraction, prompt engineering, API orchestration), with architecture, tests and code review kept in my hands.

Tech stack

Languages  

Backend  

Frontend and mobile  

Data and DevOps  

GitHub stats

Elsewhere

🇫🇷 En français

Développeur fullstack freelance basé à Lomé (Togo, GMT+0), disponible en télétravail. Je conçois, développe et déploie des applications complètes, de l'API à l'interface, avec l'IA comme outil de travail quotidien. Python, TypeScript, Java : cinq ans d'expérience sur des systèmes en production (télécoms, santé, ressources humaines).

En ce moment : Mr Wallet, une application de gestion de finances personnelles utilisée par environ 200 personnes, gratuite, sans publicité et open source. Une application mobile (Expo, offline-first) et un assistant financier conversationnel par IA sont en cours de développement.

Aussi : AutoMaintainer, une GitHub App publiée sur le Marketplace, et SecurePasswordCrypt, une bibliothèque .NET de chiffrement AES-GCM et de hachage de mots de passe.

Mon portfolio et mon CV sont disponibles en français.