10 years of experienceAgentic full-stackWeb, mobile & AI
Jean-Baptiste Thery, senior full-stack developer: I architect from scratch, take over, evolve, fix and maintain web and mobile solutions, AI features included, fully remote. jCode also develops and maintains its own products, WorkoutGen and Ragmir.
A selection across education, retail, finance and software, from business applications to jCode's own products.
Sciences PoClient · higher education · 18 months
DecathlonClient · retail · 5 months
Suzuki FranceClient · dealer websites · 12 months
OneyClient · banking · 6 months
LeadbayClient · Y Combinator F25 · 21 months
HelloPrêtClient · mortgage platform · 2 months
Stellia.aiClient · École Polytechnique incubator · 7 months
Biodiv-WindClient · monitoring · 6 months
WorkoutGenjCode product · workout generator · 16 months
RagmirjCode product · agentic RAG · 3 months
jCode builds and maintains applications for its clients, and products of its own, to the same standards.
01 / Freelance services
A senior developer, fully remote, who architects new applications, joins your team, and takes over, fixes and maintains existing ones.
02 / Independent products
Created and maintained by jCode: WorkoutGen, a personalised workout generator, and Ragmir, open-source agentic RAG.
Explore the productsI'm Jean-Baptiste Thery, founder of jCode, and I work fully remote. My engineering habits come from projects delivered before AI coding tools.
Today I work with coding agents within each client's rules, and I review and test every change. I am not tied to any technology: I use the one that suits your project.
My GitHub profileNo result
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Feedback from clients and colleagues on Malt and LinkedIn, quoted in its original language.
“I strongly recommend working with JB. He was instrumental in getting our frontend off the ground, handling everything with zeal, unwavering dedication, and unparalleled reliability.”
LinkedIn“On top of being very up-to-date with all techs and stacks front, he is a very creative software engineer who will use his curiosity to try and offer the best solution possible for the problem, without sticking to his guns.”LinkedIn“Jean-Baptiste Thery est une perle rare : à l'écoute, super pro, très réactif, disponible, créatif, perfectionniste, un des meilleurs développeurs que j'ai pu rencontrer dans toute ma carrière. Partir avec Jean Baptiste dans un projet, c'est l'assurance d'un travail parfait.”
MaltTell me what you want to build or improve, your budget and your target date.
Freelance web and mobile development, team support, application recovery, AI integration and automation, and technical consulting, for startups and SMEs. jCode also develops its own products: WorkoutGen, a personalised workout generator, and Ragmir, open-source agentic RAG for coding agents.
Jean-Baptiste Thery, a senior full-stack TypeScript developer with 10 years of web development, 7 of them freelance, founded EURL jCode, registered in Paris. His 14 client projects add up to more than 80 missions on Malt, which counts every billed period of an engagement. You work directly with him, from the brief to delivery.
Yes, within your company's rules, with coding agents such as Claude Code and Codex, from exploring a codebase to features, tests and documentation. I review and test every change before delivery, as set out on the agentic development page.
Because writing code was never the whole job: someone must decide the architecture, check security and data handling, choose what to test and answer for each release. The five questions to ask a developer who uses AI help you check these points.
Send a short description through Malt or LinkedIn: what you want to build or improve, your current situation, your budget and your target date. We can then agree on the scope and a suitable way to work together.
No. All my freelance work is fully remote, under a contract with EURL jCode, a French company, whether you are in France, the UK or the US.