Sébastien Nichele

Trainer / Software Architect / Craftsman Fullstack Java / Scala / JS / TS, adept of reactive functional programming and "quality" code, 20+ years of experience.

After more than 12 years of practicing Java (server-side and client-side with Swing) and Javascript, I have enriched my expressiveness by adding functional programming to my skillset since 2011 with Scala / TypeScript. I am particularly attentive to producing semantic, expressive, and maintainable code. Convinced by DDD's Ubiquitous Language and the reliability brought by carefully crafted self-documenting code – automatically tested if necessary (tdd, bdd, pbt...) – I defend daily what some call "over-quality", namely professional code that tries to best meet ALL needs (colleagues, maintenance, production...), and not just a few "passing cases" of functional needs and many bets on statistics. By relying on domain-driven design, Onion / Hexagonal type architectures, and controlled separation of responsibilities, I realize 90+% of the need without any trace of graphical interface – and therefore highly unit-testable and decoupled from the front-end framework and its associated dramas (complicated version upgrades, dependencies...).

I set up and lead workshops and introductory training sessions on these topics and practice pair programming and coding dojos to share knowledge and improve as a group.

I am a proponent of remote work, which allows everyone to win when one practices their profession with rigor and passion.

Throughout my career, I have worked in project mode or agile mode for many different clients (banking, insurance, administration, public service, industry, mass retail...)

I use Claude Code (among others) daily, carefully guiding its output to remain capable of maintaining the produced code.