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Sébastien

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Most projects need a designer, a developer and a tester. I am all three, which removes the back and forth and the misunderstandings between them.

Web & mobile development

I take a product from the database schema to production monitoring. Seven years on a health platform serving 26 million users taught me what breaks at scale, and how to avoid it.

  • Complete web applications: architecture, REST or GraphQL API, database, frontend
  • Mobile apps and responsive interfaces tested on real devices
  • Taking over and modernising existing codebases, migrations, technical debt
  • CI/CD, containerisation, cloud deployment and production releases
  • AI and LLM integration into an existing product
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