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Julien ThomazoJT

Julien Thomazo

Expert in Generative AI Systems

€750/day
Montpellier, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Julien

AI Engineer and Data Scientist with over 5 years of experience in AI/ML and 2 years in Generative AI, I support companies and R&D teams in the design, development, and deployment of tailor-made artificial intelligence solutions.

## Main Expertise ##

LLM Fine-tuning, RAG architectures, multi-agent systems, Data Engineering, and ML pipelines.

## Technologies ##

Python, Pytorch, Hugging Face, LangChain, LangGraph, FastAPI, Streamlit, Docker, Qdrant, FAISS, AWS-Sagemaker


## Approach ##

Combining technical rigor with a spirit of innovation to transform complex ideas into reliable, scalable, and production-ready AI applications.

## Types of Projects Completed ##

  • Development of specialized RAG applications (medical, accounting, insurance, dog training).
  • Creation of multi-agent systems for complex analysis automation (OCR, FEC, clinical documents).
  • Implementation of anomaly detection pipelines (insurance fraud, finance).
  • Applied research: new prediction methods in marine biodiversity (+30% performance vs SOTA).

## My Added Value ##

I master the entire AI value chain – from architecture design to production deployment – always keeping your business challenges, result reliability, and ease of use for your teams in mind.
  • French

    Native or bilingual

  • English

    Fluent

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

Experience

  • Inria
    Research Engineer in Deep Learning & LLM
    PUBLIC SECTOR
    May 2023 - Today (3 years and 1 month)
    Montpellier, France
    Situation: Development of an innovative approach to predict fish species assemblages using Generative AI (LLMs).

    Task: Transform continuous data into an LLM-interpretable format to predict fish assemblages.

    Actions:
    - Conducted a literature review
    - Built a baseline ML pipeline (XGBoost)
    - Designed an original dataset
    - Fine-tuned LLM models (GPT-2, Llama2)
    - Optimized hyperparameters
    - Compared performance
    - Wrote a scientific paper

    Result: Revolutionary predictive method achieving 30% higher performance than traditional approaches. Innovative methodology intrinsically modeling inter-species interactions.

    Stack: Python, Hugging Face, PyTorch, Scikit-learn, XGBoost, Dash, Matplotlib, Seaborn, Geopandas, Git/Github
    Deep Learning Hugging Face Machine learning LLM NLP
  • Mutuelle Santé
    Data Scientist & Data Engineer for Anomaly Detection
    HEALTH AND WELLNESS
    January 2023 - August 2024 (1 year and 7 months)
    Montpellier, France
    Situation: Development of a hybrid anomaly detection system for healthcare reimbursements across a network of 10 mutual insurance companies (2.8M beneficiaries).

    Task: Design and implement a complete anomaly detection architecture combining traditional statistical methods and Generative AI (LLMs).

    Actions:
    - Designed an ETL pipeline
    - Developed multi-scale temporal features
    - Implemented an ML ensemble approach (Random Forest, XGBoost, SVM)
    - Deployed an inference pipeline

    Result: High-performance anomaly detection system achieving Recall = 0.40 and Precision = 0.55, outperforming rule-based solutions.

    Stack: Python, DuckDB, Polars, Pandas, Scikit-learn, NumPy, Matplotlib, Seaborn, XGBoost, PyTorch, Jupyter, Git/Github, Advanced SQL
    SQL Polars XGBoost Anomaly Detection Feature Engineering
  • Fintech
    AI Engineer & Data Scientist
    BANKING AND INSURANCE
    August 2024 - February 2025 (6 months)
    Montpellier, France
    Situation: Development of an innovative solution for automated analysis of FEC (Fichier d'Écritures Comptables - Accounting Entries File), combining conversational AI agents and automatic Python code generation.

    Task: Design and implement a multi-agent system powered by LLMs to automatically analyze accounting data and generate custom Python code.

    Actions:
    - Designed a multi-agent architecture
    - Built a code generation engine
    - Implemented an RAG system
    - Created a secure sandbox
    - Developed a FastAPI backend with a Streamlit interface

    Result: Functional POC reducing analysis time from half a day to a few minutes, enabling non-developers to generate complex analysis code via natural language.

    Stack: Python, FastAPI, Streamlit, LangChain, LangGraph, LangSmith, OpenAI API, ChromaDB, FAISS, Hugging Face, Sentence Transformers, Pandas, NumPy, Docker, Git/GitHub, Pydantic
    Langchain LangGraph ChromaDB RAG AI Agents

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Education

  • Certified AI Engineer
    AI Makerspace
    2025
    Ingénieur IA Certifié
  • Certified Data Scientist
    Mines ParisTech
    2023
    Certification Data Scientist

Skill set

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