Freelancer profile translated to English.
Back to original languageAbout Jean Sébastien
Increase your project productivity by 30% while ensuring deliverable quality.
Tired of "Vibe Coding" and accumulating technical debt?
Former Engineering Manager at Scaleway, I help project leaders and startups transform their AI prototypes into scalable and high-performance production infrastructures.
Apply a real AI Engineer vision
🛠 My method: The iASSET Framework
I don't just write code; I build an asset (ASSET) for your company. I act as a Founding Engineer to structure your technical stack and projects around 5 pillars:
[A]rchitecture:Clean & Hexagonal Design (Go, NestJS) to safeguard your business against AI hallucinations.
[S]pecification:Strict Contracts (Protobuf, Zod) to cement your business rules.
[S]ecurity:Data Isolation and deployment on Sovereign Cloud (Scaleway). "Science without conscience is but the ruin of the soul."
[E]valuation:Expert Code Review (Human-in-the-loop) to maintain full control of your IP.
[T]esting:CI/CD Automation and AI Evals to deliver quickly, without ever breaking production.
🎯 Why work with me?
Critical Backend Expertise:I've managed €2M/month flows (SGW Payment). I know what "High Availability" means in Go.
Augmented AI, Not Replaced:I don't develop models; I industrialize your AI R&D (RAG, pgvector, Mistral/Llama) for real results, without hallucinations.
"Founding Engineer" Vision:I advise on Build vs Buy decisions and cost optimization (FinOps).
🚀 Support Format
Tech Support & Coaching:3-month support to structure your junior teams.
AI Maturity Audit:2-day flash diagnosis of your architecture and security.
MVP AI-Ready:Development of your critical components (Go, gRPC) in commando mode.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 10km)
Experience
- HodorSenior Software EngineerSOFTWARE PUBLISHINGApril 2026 - Today (4 months)Paris, France
Senior Software Engineer - Identity, policy & guardrail layer for AI agents
The adoption of autonomous agents is the new battleground. But scaling without control exposes companies to security risks and cost overruns. At Hodor.ai, we are building the essential governance layer to secure the agent ecosystem (Agentic ID).As a Senior Engineer, I designed and developed the infrastructure, security, and connectivity components necessary to transform autonomous agents into identifiable, manageable, and auditable collaborators.Key Achievements:- PaaS Migration (Scaleway): Led the complete migration to Scaleway PaaS, optimizing resilience and real-time scaling of agent fleets.
- Zero Trust Security (ZTaaS): Architected the Zero Trust platform and integrated RBAC for AI, securing Machine-to-Machine interactions and sensitive data.
- MCP & OpenAPI Ecosystem: Created the automated import system (OpenAPI / MCP) and a robust MCP / stdio tunnel to streamline agent connectivity.
- AI Innovation (Code Mode): Developed a mechanism allowing agents to dynamically execute their MCP actions via code / SDK.
- Governance Dashboard: Developed the centralized back-office from scratch to monitor consumption, audit actions ("who did what"), and manage policies.
Tech:Go, Python, NextJS, Scaleway PaaS, MCP, OpenAPI, Zero Trust, RBAC, Stdio. - Wast'OFounding engineer & AI — GreenTech Solution (IoT & RAG)ENVIRONMENTALNovember 2025 - Today (9 months)Paris, France
📍 AI Engineer & Cloud Architect | GreenTech Solution (Sovereign)
How to automate complex selective sorting via AI without compromising data sovereignty? For Wast’O, I designed a complete European ecosystem (IoT & AI) capable of moving from POC to industrial scale in record time.The challenge was to eliminate AI hallucinations while ensuring a Green IT infrastructure. My intervention focused on two pillars:AI Engineering (RAG):Deployment of a highly reliable conversational assistant querying regulations in real-time. Dynamic data sourcing for 100% accuracy.Performance & Sovereignty:Serverless architecture on Scaleway for on-demand scalability, minimizing both carbon footprint and Cloud Burn (FinOps).As Founding Engineer, I secured the overall technical trajectory:Critical Backend:Development of high-performance APIs (Node/PostGIS) for collection zone geofencing.IoT Hub:Real-time centralization and monitoring of connected sensor streams.Optimization: Halved maintenance costs through a unified architecture (React Native / TS).Result:A robust, RGPD-compliant by design, and nationally deployable solution.Tech stack mastered on this project:AI: RAG (Sovereign LLM), Vector Search.Backend: NestJS, Golang (internal tools), PostGIS.Infra: Scaleway Serverless, GitHub Actions (CI/CD).Mobile: React Native (Single iOS/Android/Web codebase). - MiKozFounding engineer & AI & Fullstack Engineer | Mi Koz: EdTech Ecosystem powered by SLMEDUCATION AND E-LEARNINGFebruary 2026 - Today (6 months)Saint-Denis, Réunion
📍 AI & Fullstack Engineer | Mi Koz: EdTech Ecosystem powered by SLM (WASM & Rust)
How to offer high-fidelity conversational AI in Creole without relying on cloud giants? With Mi Koz, I deployed a learning platform whose intelligence comes from specialized language models (SLM) and a high-performance audio studio.The innovation lies in a unique vertical integration of AI:Specialized Intelligence (SLM):Use of small language models (Small Language Models) specifically trained via my L2S engine. This approach guarantees total linguistic accuracy (French/Creole) and optimized execution, far from the costs and biases of generalist models."Edge" Audio Processing (WASM/Rust):To ensure perfect responsiveness, I developed an audio mixing engine in Rust/WebAssembly running directly in the browser, coupled with a React Native application.Sovereign Infrastructure:Complete pipeline on Scaleway (S3/Serverless) ensuring communication confidentiality and on-demand scalability.This project is proof by example of my value as a Founding Engineer:Data Cycle Mastery:Ability to create proprietary datasets to feed proprietary SLMs.Systems Expertise:Successful marriage of low-level (Rust, WASM) and modern cloud architectures.Technological Independence:Design of solutions capable of running locally or on sovereign cloud, outside of proprietary silos.Mi Koz is not just an application; it's a demonstration of strength: cutting-edge AI, mastered from raw data to user interface.
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Education
- Tech Lead / Title Level 7 / Master's DegreeOpenclassrooms2019Gestion de projets Management d'équipes Etude et développement d'applications et d'infrastructures Etude de migrations
- Web DeveloperOpenclassrooms2016Développement d'applications Front-end Développement d'applications N-tiers
Certifications
- Launch your own websiteOpenclassrooms2020
- PHP / Symfony Web DeveloperOpenclassrooms2016