Freelancer profile translated to English.
Back to original languageAbout Quentin
CTO & Software Architect, 8+ years of experience.I design and deliver AI and Web3 systems in production. Not POCs: platforms that run, scale, and handle real-world load.
Recent Achievements
- AI Culinary Assistant for Elle à Table (CMI Group) - 35,000 recipes, 9-step NLP pipeline, dual-vector RAG (Qdrant), Gemini chat with tool calling, hands-free voice mode.
- L'Atelier - open-source orchestrator for AI agents in isolated sandboxes (Firecracker then Kata Containers / Kubernetes).
- WebAuthn Smart Wallet + Account Abstraction (ERC-4337 / ERC-7579) - 100k+ loads/day, seedless, biometric.
- AWS to self-hosted Kubernetes migration - -85% cost, 99.99% uptime.
AI & LLM
- Production LLM integration (Gemini, Claude, OpenAI) - tool calling, streaming, safety layers
- AI agent orchestration in sandboxes (Firecracker, Kata Containers)
- NLP & linguistic parsing (spaCy, multi-strategies)
- RAG & vector search (Qdrant, dual-vector embedding)
- Tooling: Vercel AI SDK, Langchain, MCP (Model Context Protocol)
- LLM Observability: Langfuse (tracing, prompt A/B testing, response evaluation)
Blockchain & Web3
- Solidity smart contracts, EVM gas optimization (2nd worldwide gas golfing)
- Account Abstraction (ERC-4337, ERC-7579, WebAuthn)
- High-performance blockchain infrastructure, DeFi
Architecture & Infrastructure
- Kubernetes, Pulumi, Infrastructure as Code
- TypeScript, Bun, Elysia, Go
- Cloud migration, cost optimization
- Technical leadership, engineering leadership
Open Source Contributor: ZeroDev Kernel, eRPC (Go), Pimlico SDK, SST, L'Atelier.
I prefer complex missions: production AI, blockchain, distributed infrastructure. Freelance technical leadership, audits, architecture, or complete build.
French
Native or bilingual
English
Fluent
Can work on-site
Rennes (up to 30km)
Experience
- Frak LabsCTO - Co-founderSOFTWARE PUBLISHINGJanuary 2023 - Today (3 years and 5 months)Paris, FranceCo-founder and CTO. Full technical leadership of a Web3 affiliation platform: architecture, team, infrastructure, product, technical fundraising.Key achievements:- WebAuthn Smart Wallet + Account Abstraction (ERC-4337): 100k+ loads/day, seedless and biometric- L'Atelier: open-source orchestrator for multi-agent AI agents in Firecracker / Kata Containers sandbox- EVM Smart Contracts (Polygon, Arbitrum): external audits passed with minor feedback only- AWS to self-hosted Kubernetes migration: 85% lower costs (<$500/month), 99.99% uptime- TypeScript / Elysia Backend: 1M+ requests/hour in production- AI Stack: OpenAI, Claude, Gemini, Vercel AI SDK, Langfuse for tracing and evaluation
- CMI GroupAI Consultant - CMI Group / Elle à Table (via Frak Labs)PRESS AND MEDIAJune 2025 - January 2026 (7 months)Paris, FranceDesign and development of an AI culinary assistant (conversational AI Agent) for Elle à Table (CMI Group).Full system: ingestion of 35,000+ recipes, RAG, real-time conversation with voice guidance.Key achievements:- 9-step NLP pipeline (spaCy): French linguistic parsing, deterministic allergen detection, dietary classification- Dual-vector semantic search (Qdrant): matching by ingredients and user intent- Conversational AI Agent (Gemini): tool calling, preference management, streaming- Hands-free cooking mode: real-time voice synthesis, step-by-step instructions- Safety-first: 100% allergen reliability, 99.9% parsing accuracy, zero LLM on critical health decisions- LLM Observability: tracing, evaluation, and prompt A/B testing (Langfuse)
- Contributeur actifActive contributions to the blockchain, infrastructure, and AI ecosystemSOFTWARE PUBLISHINGJanuary 2023 - Today (3 years and 5 months)Active open-source contributions to the blockchain, infrastructure, and AI ecosystem. Goal: strengthen the components I use in production and share experience.Contributed Projects:- ZeroDev Kernel: gas optimization, WebAuthn validator, signature systems (Solidity)- eRPC: strategic advice, TypeScript packages, core contributions in Go, Go / TypeScript bridge- Pimlico / Permissionless: smart account integration, SDK optimization- ElizaOS: PgLite support for blockchain AI agents- SST, Ponder, Wagmi / Viem: various fixes and improvements
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Education
- Master of Computer ScienceSupinfo, Nantes2020Études en alternance chez Capgemini (3 ans). Développement, architecture logicielle et gestion de projet. Projet de fin d'études : conception d'une blockchain from scratch.
- DUT in Computer ScienceIUT Nantes2017Fondamentaux du développement informatique, algorithmique et gestion de projet.