Freelancer profile translated to English.
Back to original languageAbout Stephane
Is your AI project stuck in the POC phase? I design and deliver AI systems in production: autonomous LangGraph agents, RAG pipelines, and end-to-end full-stack applications.
At QuRISK, I lead the AI layer for oQo (myoqo.ai), a business data reasoning copilot: agent orchestration, hybrid retrieval, continuous evaluation (quality, cost, latency). I also founded Buma (buma.live), an AI educational platform I delivered solo into production for educational institutions.
What I build concretely:
- Autonomous agents with LangGraph (StateGraph, tool use, contextual memory)
- RAG pipelines (ingestion, hybrid retrieval, reranking, RAGAS evaluation)
- Full-stack applications (FastAPI, Next.js, PostgreSQL)
- LLM integration (Claude, OpenAI, Azure OpenAI, Mistral)
I work from design to deployment, with a real focus on costs and latency. If you have an AI project to turn into a real product, I am available.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- QuRISK (Quantum Risk Advisory)Fullstack AI EngineerTECHSeptember 2024 - Today (1 year and 9 months)Courbevoie, FranceResponsible for the AI layer of oQo (myoqo.ai) on complex business data for quantum technology professionals.Design and production deployment of LangGraph agents (StateGraph, tool use, conditional routing, persistent state management, degraded modes).RAG pipelines with dense+sparse hybrid retrieval and reranking.Continuous evaluation of responses via LangSmith: faithfulness, hallucination rate, latency, costs; LLM-as-a-JudgeLoRA/QLoRA fine-tuning on business corpus.Deployment on AWS with CI/CD and Docker.End-to-end development of all Backend and Frontend partsStack: Python, FastAPI, LangGraph, LangSmith, pgvector, Docker, AWS.
- Buma EducationCo-founderEDUCATION AND E-LEARNINGJanuary 2025 - Today (1 year and 5 months)Co-founder of Buma (buma.live), an AI SaaS educational platform in production, B2B and B2C model.Full ownership: product strategy, design, end-to-end development, and continuous iteration based on field feedback (schools, students, parents).Design and development of 4 applications5+ AI features delivered: persistent tutor agent, automatic summaries, assignment grader, adaptive exercise generation.
- Missions IndépendantesAI & Fullstack EngineerTECHOctober 2023 - March 2026 (2 years and 5 months)Design and delivery of full-stack AI solutions for startups and SMEs across multiple sectors.End-to-end development: Python APIs (FastAPI), Next.js/React interfaces, LLM integration (OpenAI, Anthropic, Mistral), and RAG pipelines on proprietary data.Product design and iteration on field feedback: functional scoping, mockups, client needs gathering, iterative production deliveries.LLM Evaluation: RAGAS, DeepEval, LLM-as-a-judge. Cost and latency optimization.Stack: Python, FastAPI, Next.js, LangChain, LangGraph, PostgreSQL, pgvector, AWS.
Recommendations
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Engineering degreeEFREI2026Intelligence Artificielle et Data Engineerging
- License, Big Data for Digital TransformationESIGELEC: GRADUATE SCHOOL OF ENGINEERING2023License, Big Data pour la Tranformation Numérique