Freelancer profile translated to English.

Description

Senior Software Engineer with over 12 years of experience, I have worked in large-scale AdTech environments, from tech startups to international groups like Microsoft.

Today, as a freelancer, I work both as a data systems and AI engineer, and as an AI trainer, focusing on the practical uses of LLMs in businesses. I have an NDA (Activity Declaration Number) to work as a trainer.

I specialize in the design of measurement, tracking, and automation systems, particularly through the development of JavaScript probes and critical software components integrated into platforms handling billions of events per day. My work is carried out in contexts with strong constraints on reliability, performance, and multi-environment compatibility.

My expertise covers backend and fullstack, data engineering, as well as workflow automation and applied AI (LLM, RAG, embeddings, API orchestration). I work on creating new architectures as well as stabilizing, optimizing, and industrializing existing systems.

In parallel, I design and deliver AI training (LLM, deployment, prompt engineering, regulatory issues), with an approach focused on use cases, business adoption, and production deployment.

Accustomed to international and distributed teams, I work autonomously, with a strong product culture and particular attention to business issues, metrics, and user experience.

I assist companies on high-impact missions: applied data & AI, automation, scalable backend platforms, AdTech, and advanced measurement systems.

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent
Spanish
Basic

Workplace preferences

Can work on-site

Quimper (up to 50km), Nantes (up to 30km), Rennes (up to 20km), Brest (up to 30km)

Creative Tech School
AI Trainer
EDUCATION AND E-LEARNING
April 2026 - Today (2 months)
Hérouville-Saint-Clair, France
Independent trainer for the "Artificial Intelligence Project Manager" program.

Design and delivery of the "AI Solutions Deployment" module (112 hours), currently in progress.

Topics covered:
- LLMs (local & API) and RAG architectures
- REST APIs & FastAPI
- Performance evaluation (LLM KPIs)
- Security (prompt injection, guardrails, OWASP)
- Compliance (GDPR, AI Act, DPIA)
- UX/UI & accessibility (RGAA)
- Prompt engineering & tools (LangChain, LangGraph, MLflow…)
- Ethics & bias

Active NDA number
Pedagogy LLM RAG FastAPI KPI
Microsoft
Software Engineer II
June 2022 - January 2024 (1 year and 7 months)
Quimper, France
Following the acquisition of Xandr by Microsoft, we continued to create projects within our Measurement & Attribution team for various major market players as well as the company's internal products. I was able to adapt our measurement solutions, add REST services for their configurations, or perform data digging.
JavaScript Java Python Numpy AdTech
Xandr
Software Engineer II
April 2018 - December 2022 (4 years and 8 months)
Quimper, France
The team's mission continued after its integration into the AT&T telecommunications group. During this period, I was able to improve viewability measurement in new advertising formats (native, video). This involved creating hybrid mobile applications (Android, iOS) with automated tests (via Appium and Browserstack). During these integrations, I was able to integrate international advertising standards such as IAB's OMSDK. My mission regularly consisted of improving measurement quality through active debugging of complex cases for international clients. I had to understand certain disparities between inventories (e.g., Android vs. iOS) and also contribute to better internal metrics. I also contributed to the development of Python applications to automate certain complex activation steps in a stable Docker/K8S environment. D&I Project (impact ambassador): The year before the COVID crisis, I organized a final day of volunteering where all employees of the company helped the Concarneau animal shelter, including the creation of a walking path.