Mathis Boulais

Full-stack developer

Available for new projects

I design and build websites and apps for independents, small businesses and new ventures. From design to launch, one person to talk to.

  1. Every project starts as a single idea.
  2. I turn it into design, code and a product that ships.
  3. Here is what came out of the prism.

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What came out of the prism

Products I build and projects delivered to clients, each taken from idea to launch.

  1. — Community project · Open source

    Zephyr

    25+ stars on GitHub

    Open-source mod manager

    Desktop app to install and manage mods from Thunderstore, NexusMods, CurseForge and GitHub. Shareable profiles, built-in config editor, randomizer module.

    • Tauri 2
    • Svelte 5
    • Rust
  2. — My own product

    Wegir

    GPS navigation for convoys

    Mobile and web app to drive as a group without getting lost: shared route, live positions, push-to-talk, alerts. Live on the App Store.

    • React Native
    • Expo
    • Vite
    • NestJS
    • Prisma
    • MapLibre
    • RevenueCat
  3. In development — My own product

    Fitness coaching app

    Coaching, training and nutrition in one app

    Mobile fitness app: training programs from free to personal coaching, nutrition tracking with macros, and progress charts with body measurements and photos. Premium subscription through the App Store and Google Play.

    • React Native
    • Expo
  4. — Personal project · Developer tool

    Game Factory

    Games built by agents

    A chain of AI pipelines that turns a concept into a Godot mobile game: tickets, code, pull requests and reviews generated automatically on GitHub.

    • Claude Code
    • GitHub Actions
    • Godot 4
    • Docker
  5. — Client project

    Meme Rina

    Website for a pizzeria

    Website for a neighborhood pizzeria in Chatou, near Paris. Full menu, table booking, delivery ordering and Google reviews, all one tap from the home page.

    • Next.js
    • React
    • Netlify

Three ways to work together

A clear quote, one person to talk to, from first sketch to launch.

  • Business website

    from €900

    For

    Craftspeople, shops and independents who want to be found and called.

    Included

    • Custom design, no template
    • Fast and easy to read on mobile
    • Local SEO (Google Business, service and city pages)
    • Contact form and booking
    • Launch, domain name and email setup
  • Web or mobile app

    Custom quote

    For

    A business tool, a customer app, an MVP to ship fast and clean.

    Included

    • Scoping and wireframes
    • React / React Native, Node API
    • Payments, accounts, notifications
    • App Store and Play Store release
    • Documented code that you own
  • Redesign and maintenance

    from €60/month

    For

    An existing site that is slow, dated, or that nobody knows how to edit anymore.

    Included

    • Speed, mobile and SEO audit
    • Full redesign or targeted fixes
    • Updates, backups, monitoring
    • One contact, reply within 24 hours

One person, start to finish

Full-stack developer based near Paris, France.

I build my own products: a navigation app on the App Store, an open-source mod manager, a pipeline of AI agents that makes games.

And websites for local businesses, like Meme Rina, a pizzeria in Chatou.

From design to deployment, you talk to the person who writes the code.

Technologies used in these projects

  • Tauri 2
  • Svelte 5
  • Rust
  • React Native
  • Expo
  • Vite
  • NestJS
  • Prisma
  • MapLibre
  • RevenueCat
  • Claude Code
  • GitHub Actions
  • Godot 4
  • Docker
  • Next.js
  • React
  • Netlify

Available for new projects

Your idea is next.

Describe your project in a few lines. I’ll get back to you to talk it through.

Details

Based in
Choisy-le-Roi, near Paris, France

SIREN 130 737 356

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