Thomas Demoncy

As a former Product Manager turned Full-Stack developer, I bring a rare approach: I don't just execute a spec sheet — I challenge specs, prioritize high-impact features, and deliver robust, tested, and maintainable code.

Before coding, I was a Product Manager at Plato (tech mentoring platform) and Greenly (carbon footprint tracking, Series B). There, I learned to structure a product, prioritize by value, and deliver quickly with limited resources.

Today, I leverage this dual expertise for ambitious startups that need a developer capable of making both technical AND product decisions.

What I do concretely:

→ Develop complete web applications (front + back)

→ Create MVPs — from idea to first user

-> AI-assisted development with Claude Code / Figma Make / Stitch

→ Implement scalable architectures (REST API, micro-services, ETL)

→ Integrate best practices: TDD, CI/CD, code review

Tech Stack:

Front: React · Next.js ·

Back : NestJS · Ruby on Rails · PostgreSQL (TypeORM / ActiveRecords)

I use Claude Code to help me code faster, but I'm careful not to put just anything into production.

How I work:

I work in short cycles with regular deliveries.

Each week, you'll see the product progress with regular feedback from me.

Available for full remote or hybrid work from Marseille. ☀️