Acerca de Sébastien
You want to use AI — but you're afraid of hallucinations,
of ruining your system or your credibility.
You're right to be.
I build AI systems that don't drift. The reliability is
in the architecture, not in the prompt: the AI works within
constraints I design, and every output is validated before
it reaches the user.
What I implement:
- Constrained inputs — RAG, JSON or Markdown rule systems
- Constrained outputs — validation scripts that check every
answer before delivery
- Fallback logic and guardrails for edge cases
- Self-maintaining systems that flag inconsistencies when
your code or content changes
If you need to keep the AI's creativity, I help you add the
right guardrails to get as close as possible to zero
hallucination — with human-in-the-loop where it matters.
I've built three AI systems from the ground up:
- Plumeum — a LinkedIn ghostwriting app with self-improving
rules
- Lunema — an adaptive meditation app, zero hallucinations
in production
- Mon Histoire Magique — multilingual generative stories
for children
Before AI: ten years as an international journalist (trained
to make complex things clear and defensible) and seven years
in technical support for a major US tech company.
If you want AI that works reliably — not just in the demo,
but in production — let's talk.
Francés
Bilingüe o nativo
Inglés
Competencia profesional completa
Español
Competencia profesional completa
Acepta trabajo presencial
Barcelona (hasta 30 km)
Experiencia
- IndependantReliable AI Systems Architect | FR · EN · ESAGENCIAS DE SUBCONTRATACIÓNagosto de 2024 - Hoy (2 años)Barcelona, EspañaAI systems that use the right data and deliver constrained, reliable outputs. systems I design are self-maintaining and self-updating: part of the code or content changes, they flag the inconsistency instead of failing silently. AI's implement guardrails hallucination — with human-in-the-loop
- US tech company (confidential)Technical Support Advisor (T2)AGENCIAS DE SUBCONTRATACIÓNenero de 2017 - enero de 2024 (7 años)Barcelona, EspañaSmart home, connected hardware, and voice assistant products (client confidentiality). Frontline diagnosis at international scale; contributor to documentation and faster-resolution workflows.
- IndependantInternational field journalistCINE & AUDIOVISUALenero de 2008 - enero de 2017 (9 años)Doha, CatarTen years of TV field reporting for French and international broadcasters (M6, TF1 , France 2, Al Jazeera, France 24, Arte, RTS). Trained to translate complex situations into clear, defensible output under pressure. Author of two published novels.
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Formación
- DUT Services et réseaux de CommunicationUniversité de Dijon2004Programming, Network, Computer graphics
Certificados
- Supervised Machine Learning — DeepLearning.AIStanford University2025
- Elements of AIUniversity of Helsinki2024