Senior fullstack freelance developer with 9 years of experience. Available for hire French and English-speaking markets.

I design and ship complete web applications for startups and enterprises, from architecture to production. I work across the full stack — frontend, backend, infrastructure — and integrate AI as a functional layer when it adds real value.

I take on engagements as the sole technical owner of a product or as a senior contributor inside an existing team. No management role.

Core: TypeScript · React · Next.js · Svelte / SvelteKit · Node.js · Fastify · PostgreSQL · Drizzle Also: Vue · Angular · Astro · Strapi · Supabase · Firebase AI layer: Claude API · OpenAI · LLM · RAG · Agents · MCP · n8n Workflow: Claude Code · Cursor · Vitest · Playwright · GitHub Actions

Sciences Po · Decathlon · Suzuki France · Oney (Banque Accord) · Leadbay (YC F25) · Stellia.ai (incubated at École Polytechnique) · HelloPrêt

WorkoutGen — AI-powered personalized training SaaS. 10,000+ users across 67 countries, 8 languages. Sole technical owner: architecture, frontend, backend, LLM integration, ML pipeline, infra, security, monitoring.

📩 jb.thery@jcode.works 💼 LinkedIn 🥕 Malt