About Sylvain
French
Native or bilingual
English
Fluent
Experience
- IndépendantFull-Stack & AI Automation DeveloperJanuary 2023 - Today (3 years and 6 months)Lausanne, SwitzerlandFull-stack and mobile developer, I design and deliver web/mobile applications and AI automations — from scoping to production.In 2025-2026, I designed and deployed about fifteen projects: web applications (Next.js, React, TypeScript, Tailwind), mobile apps (React Native / Expo), back-ends and databases (Supabase / PostgreSQL, Prisma), asynchronous processing queues (BullMQ / Redis), and Python APIs (FastAPI). I integrate AI into real products (Claude / Anthropic SDK, agents, automations) and work in a monorepo architecture.My background is unconventional, and that's a strength: former investigator in the cybercrime brigade (crypto-asset investigations), I bring investigator rigor, a true security culture, and the ability to simplify complex technical subjects.Crypto & DeFi, in practice: independent trainer on blockchain and DeFi, and active daily user — staking, liquidity provision (LP), and airdrops on EVM and Solana ecosystems, as well as Bitcoin. I operated mining (Kaspa) and am currently running a validator node (Gnosis Chain).What I can do for you:- Design and develop your web or mobile application (quick MVP or complete product)- Automate your business processes with AI (extraction, qualification, reporting, agents)- Integrate authentication, payments, databases, mapping, notifications, APIs- Audit and secure your applications, your wallets, and your digital assets- Train your teams in blockchain, DeFi, and digital securityMain stack: Next.js, React, React Native / Expo, TypeScript, Tailwind, Supabase / PostgreSQL, Prisma, Python / FastAPI, Redis, Anthropic SDK.Crypto: EVM, Solana, Bitcoin, DeFi (staking, LP, airdrops), mining, and validator nodes.Available for freelance missions, in French as well as in English.
- Etat de GenèveDetective - Computer Crime UnitOctober 2020 - December 2022 (2 years and 2 months)Genève, SwitzerlandConducting complex digital investigations and data extractionsSpecialized investigations into crypto-assetsWriting technical reports and technological watchCollaboration with the Public Prosecutor's Office and judicial authorities
- Police cantonale de GenèvePolice OfficerMarch 2019 - September 2020 (1 year and 6 months)Genève, SwitzerlandJudicial follow-up unit at the Servette police stationEmergency interventions, investigation follow-up, and interviews
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Education
- Federal Police Officer Diploma, PoliceSavatan Academy2014Brevet fédéral de Policier, Police
- Computer ScienceHEIG-VD2013Informatique