About Guillaume
French
Native or bilingual
English
Native or bilingual
Spanish
Fluent
Experience
- ArtefactSenior Data ScientistCONSULTING AND AUDITSMay 2021 - Today (5 years and 1 month)Paris, FranceFraud Detection (Banking) – Designed and deployed a real-time fraud detection pipeline (PySpark + XGBoost) handling tens of thousands of transactions/day, preventing +40% fraud losses/year.Generative AI (Pharma & Telco) – Built scalable GenAI pipelines (LangChain, LangGraph, Weaviate) for document processing and website risk classification, reducing manual effort by >70%.Causal ML (Retail) – Delivered a CLTV causal inference platform (DoubleML) analyzing 12M+ customers, rolled out across 24+ markets, improving marketing ROAS by +61%.MLOps & Industrialization – Architected end-to-end ML pipelines (GCP Vertex AI, Hadoop, Kubernetes, Terraform) with monitoring, CI/CD, and production rollout at scale.
- MBDAIngénieur prototypage en Intelligence ArtificielleJanuary 2020 - July 2020 (6 months)• Etude de l'état de l'art en Deep Reinforcement Learning.• Prototypage d'une intelligence artificielle capable de déterminer un parcours d'exploration optimal par Deep Renforcement Learning (PPO) à partir de données de simulation de grande dimension.
- SimplicitiStagiaire chef de projet et support stratégie DataSOFTWARE PUBLISHINGJuly 2019 - January 2020 (6 months)Avignon, France• Conception et développement d'une plateforme de traitement et de visualisation des données clients.• Développement d'algorithmes de détection d'erreurs et de prédiction sur des jeux de données importants.• Etude des cas d'usages de l'intelligence artificielle aux besoins de l'entreprise.• Assistance au Directeur Général sur certains sujets data ados.
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Education
- Programme Grande ÉcoleCentraleSupélec2021Programme Grande École - Spécialisation en IA
- Master of ManagementESCP Europe2021Master in Management, Economie et Management
Certifications
- Google Professional Machine Learning EngineerGoogle Cloud2022