Fullstack developer · Founder · Consultant — Paris

I build products and companies, and I measure what they’re worth.

I design and ship SaaS products and AI-era tools, and run anti-hype automation consulting: ROI first, no magic. Previously a Web3/blockchain consultant — that era is in the archive below.

Now

Available for freelance projects

Product builds, automation consulting, and technical advisory. Get in touch.

Current ventures

Polystro Live · early access

The workspace built for AI-driven development: run Claude, Codex, Gemini and other CLI agents in parallel across projects, each with isolated ports, browser identities, terminals and git worktrees. Desktop app for macOS, Windows and Linux.

Electron · React · Convex

polystro.com →

NodiumLabs Live

Anti-hype automation ROI consulting for operations teams. Most agencies sell hype — we sell math: measure ROI first, start small, scale only what proves 3×+ returns.

Astro · Cloudflare

nodiumlabs.com →

Fox Close Pipeline Lab Live

A CRM intelligence layer that tells sales teams which deals can really sign: a deterministic Deal Confidence Score, a pipeline confidence map, and fragile-deal detection.

TanStack Start · Convex · Cloudflare

foxcloselabs.com →

Notarium Building

A system of record for knowledge: capture, structure and retrieve information you can trust months later. Immutable history, full export, no lock-in.

Next.js · AdonisJS · PostgreSQL

notarium.app →

Sancterius In development

A SaaS for French condominium property managers (syndics de copropriété): per-building accounting, appels de fonds, general assemblies, supplier invoices with AI extraction, and owner portals.

TanStack Start · Fastify · PostgreSQL

SaaS Backbone In development

A production-ready, self-hostable SaaS foundation: auth (MFA, OAuth, SSO, RBAC), multi-tenant teams, billing (Stripe, Paddle, Polar), admin back-office, and a plugin marketplace.

Next.js · AdonisJS · PostgreSQL · Stripe

Milestone — a book

Book cover — Learn AI Now or Fall Behind, by Sylvain Tissier

Learn AI Now or Fall Behind

Practical workflows to stay relevant at work

French edition: Adoptez l’IA maintenant ou restez derrière

Most AI advice is hype or prompt lists. This book teaches workflows — turn AI into leverage without sacrificing quality: pick the right execution model per task, install trust gates so “fluent wrong” never ships, build reusable assets that compound, and prove value with evidence.

“AI doesn’t replace standards. It multiplies them.”

Writing & contributions

More on Medium.

Archive · 2016–2018

The Web3/blockchain era — kept for the record.

  • LinkedTeam — social website for teams
  • Fox Close — the first solution dedicated to the closing of sales (original version)
  • BitFunding — open-source crowdfunding platform using Bitcoin
  • MoneyUnion — landing page for a Bitcoin remittance company
  • Ethereum ↔ Hyperledger bridge — proof of concept

“He is really nice. He knows what we want, gave us useful suggestions. Good communication, and it looks great! Thanks for the work.”

— Brian Lee

“Une implication et une organisation projet bien structurée et conforme aux engagements… Prestation d’une grande qualité d’ensemble et respect des engagements.”

— Jean-Marc Reynaud