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Mathias DupeyMD

Mathias Dupey

AI Engineer ◈ RAG ◇ Agents ◇ Weaviate

€500/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Mathias

Generative AI Engineer.

I design and industrialize RAG agents and systems that hold up in production. Not the demo that impresses in meetings: a traceable, controlled system that runs continuously. Approximate AI is a risk, not a feature.
The layer most overlook: AI Act and GDPR compliance designed from the architecture, sovereign hosting (European VPS, your cloud, or SecNumCloud base). Your data remains in Europe, independent of non-European APIs.

What I deliver:

Agents in production, multi-role orchestration (LangGraph, Claude Agent SDK, MCP)
Industrialized RAG on Weaviate: hybrid search, cited sources, anti-hallucination safeguards
Security & sovereignty: data isolation, controlled hosting, auditability
Complete LLMOps: evaluations, guardrails, observability, cost control
Knowledge pipeline automation (n8n): ingestion, continuous updates
Audit, scoping, and technical direction: architecture, stack choices, code review
Documentation and transfer: your teams remain autonomous after I leave

Stack:

Python, FastAPI, LangGraph, Pydantic AI. Claude, Mistral, OpenAI, including self-hosted. Vector databases: Weaviate, Qdrant, Pinecone, pgvector. n8n automation. Docker on European VPS, your cloud, or SecNumCloud base.
Multi-model by principle: the right model for the task and cost, not a forced dependency.

Paris.
French, English.
Founder of Ceres Broker.
  • French

    Native or bilingual

  • English

    Native or bilingual

Can work on-site
Paris (up to 50km)

Experience

  • Studely
    AI Engineer
    TECH
    April 2025 - February 2026 (10 months)
    Courbevoie, France
    Design and production deployment of two structuring AI systems. Operational productivity tripled for the functions concerned, without additional recruitment.

    System 1
    Autonomous editorial pipeline. Orchestrated agents covering the entire chain: brief ingestion, factual source verification (anti-hallucination safeguard), SEO gap analysis, editorial structuring, multilingual translation, and automatic publication on Webflow. Removed the bottleneck that was blocking organic acquisition.

    System 2
    Augmented community management. Real-time intent classification agent that qualifies each message and routes it to the correct queue, with systematic human escalation for sensitive cases rather than blind automation. Analytics back-office directly feeding product decisions. User data processed in compliance with GDPR.
    Python Langchain REST APIs Webhooks PostgreSQL
  • Ceres Broker
    Founder Engineering Firm
    SOFTWARE PUBLISHING
    November 2024 - Today (1 year and 9 months)
    Paris, France
    Engineering firm specializing in the design and deployment of AI systems in production for French B2B companies, with compliance and sovereignty as basic requirements, not options.

    Three areas: internal operations automation (workflows, document processing, reporting), commercial acquisition and qualification systems, integration of AI agents into existing business processes. AI Act and GDPR compliance considered from the architecture; data hosted in Europe and remaining the client's property at all times.

    Fixed-price project model, results-oriented, not man-days, with a team dispatched as needed (AI, engineering, web, DevOps) and a dedicated AI hub for each client. Technical direction across the entire portfolio: architecture, stack choices, code review, recruitment, and orchestration of a bench of senior freelancers.
    Python Langchain LangGraph Qdrant n8n
  • Leadchee
    AI/RAG Engineer
    TECH
    May 2025 - September 2025 (4 months)
    Paris, France
    Design and production deployment of a next-generation RAG-powered CRM, where value lies not in data entry but in automated action. Agents analyze each incoming content (email, form, external signal), enrich the prospect profile from internal and third-party sources, generate a prioritized action plan based on the commercial context, and trigger follow-ups at the right time.

    Central challenge: reliability in a noisy environment. Traceable recommendations back to their source, safeguards against erroneous actions, end-to-end latency controlled. Prospect data processing designed in compliance with GDPR. Agents orchestrated in Python on a dedicated RAG base, exposed via a Next.js commercial interface.
    Next.js Typescript Docker RAG pgvector

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Education

  • Engineering Degree, Computer Science
    CY Tech
    2024
    Diplôme d'ingénieur, Génie Informatique - Majeure Cybersécurité

Certifications

Skill set

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