Senior full-stack engineering for SaaS, business applications and open source.
jCode Works is the technical studio of Jean-Baptiste Théry, a Senior Freelance Full-Stack Developer. It brings together his products, open-source work and nine years of experience across more than 80 projects for enterprise clients, institutions and technology startups.
- Ragmir: an open-source, local-first RAG solution that gives development teams reliable, cited project context through a TypeScript library, CLI and MCP server.
- WorkoutGen: a sports SaaS available in 9 languages with more than 27,000 registered users.
- Honolulu Theme: an open-source theme for Visual Studio Code.
Full-stack architecture · SaaS and business applications · Complex frontends · Design systems · APIs and authentication · Data and cloud · Testing and CI/CD · AI-augmented engineering workflows with human review
Core technologies: TypeScript · React · Next.js · Svelte / SvelteKit · Node.js · Java / Spring Boot · Hono · Astro · PostgreSQL · Cloudflare
Jean-Baptiste works fully remote with enterprise clients, established SMEs, IT services firms, startups and scale-ups, from discovery to production.
