Roberto Arce
Data Scientist @Sanofi
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WORK HISTORY
Data Scientist @Sanofi
FR
Onboarding AI Platform (Full-Stack)- Built an AI-powered onboarding platform (FastAPI, React, DSPy) with RAG retrieval (FAISS + HuggingFace), LLM checklist generation via Claude on AWS Bedrock, and Confluence knowledge base sync- Engineered multi-role workflows (manager/buddy/employee) with reusable task bundles, AI template refinement, and approval pipelines for personalized onboarding.LLM for Email Feedback- Developed end-to-end project using email campaign data, Snowflake Cortex, and LLMs to create a feedback loop that recommends content improvements to marketers.Bot Detection – Supervised Classification- Mitigated bot activity in email campaigns using classification algorithms, improving F1 score by +3%- Refactored pipeline with Polars vectorization, improving efficiency by 22x (O(n·m) → O(n + m log m))- Enhanced ML pipeline: hyperparameter tuning, cross-validation, W&B tracking, class imbalance strategies, model benchmarking.Recommendation Engine – Medical Content- Improved recommendation model and pipeline for websites and email campaigns.Marketing Mix Model – Budget Allocation- Optimised 11% of a multi-million country marketing budget across brands and channels (media, TV, web) using Bayesian regression- Co-developed model, added new features (halo effect), integrated MLFlow, and built unit/quality tests- Established data connections between AWS S3, Databricks, and Tableau.Slack Chatbot (LLM)- Built an LLM chatbot with AWS Bedrock, Pinecone VectorDB, and Slack.> Tech Stack: AWS (Bedrock, Glue, Lambda, S3, SageMaker), Snowflake, Databricks, Python, Pandas, Polars, NumPy, Spark, FastAPI, React, DSPy, FAISS, SQLAlchemy, MLFlow, Terraform, Git, GitHub Actions, Jupyter, Postman, Tableau, JIRA.
EDUCATION
Audencia
Master's degree, Business Administration and Management, General
Grenoble Ecole de Management
Master of Science - MS, Finance
Universidad Privada de Santa Cruz de la Sierra - UPSA
Bachelor of Engineering (B.Eng.), Industrial Engineering
Scuola Master F.lli Pesenti-Politecnico di Milano
Master of Science - MS, Supply Chain and Purchasing Management
SKILLS
ABOUT ROBERTO ARCE
Experienced Data Scientist with over 5 years of expertise, currently working at Sanofi, specializing in AI engineering and machine learning to address challenges in bot detection, recommendation systems, and marketing mix modeling. Skilled in refining ML pipelines, implementing classification models, and enhancing model accuracy to support data-driven decision-making in healthcare. Committed to building scalable machine learning systems and advancing enterprise-level applications of large language models (LLMs) and generative AI.
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