
Alexandre Terrand-Jeanne
Senior Data Scientist | AI & Data Infrastructure
Salaire / Taux journalier
Montpellier, France
Freelance
Expertises
Langues
À propos
Introduction
AI/ML Engineer with 6+ years building full-stack data solutions from the ground up. Former founding data hire at Wecasa, where I drove hundreds of thousands in revenue through ML-powered matching algorithms and scalable infrastructure on GCP/BigQuery. Specialized in NLP, RAG systems, and AI automation—currently deploying LLM agents and modern data stacks (dbt, Metabase) to accelerate decision-making for startups.
Expérience de travail
Analytics Engineer
Poppins
juin 2025 - Présent
1 an 5 mois
À distance
– My mission is to build and scale the data function at this early-stage startup. – Data Infrastructure: Implemented the company's first data transformation layer connecting Supabase to Metabase using dbt and BigQuery. – AI & Automation (Dust): Designed and deployed a custom AI agent via Dust to automate data support. By indexing dbt documentation and Notion KPI definitions, the bot enables non-technical stakeholders to query data and build Metabase charts autonomously. – Business Intelligence: Built all primary business and product dashboards in Metabase from scratch. – Strategic Analysis: Developed and implemented the geographic segmentation model (based on French urban units) to guide market expansion. – Data Advisory: Serve as the data expert for the team, contributing to data science/analysis initiatives and providing recommendations on tech stack, KPI strategy, and LLM implementation.
Wecasa
avr. 2019 - déc. 2024
5 ans 9 mois
Paris, France
Expert Data Scientist & Innovation
janv. 2023 - déc. 2024
2 ans
Paris, France
– Deep expertise in building scalable data infrastructure, building complex algorithms (including NLP models, RAG systems), creating digital twins for experimentation, and leveraging data for strategic decision-making. – Developed and deployed production-ready REST API endpoints on OVH cloud infrastructure to serve Machine Learning/Deep Learning models. Enabled seamless integration of advanced AI capabilities into backend systems, ensuring scalability and reliability. – Developed and deployed a personalized matching solution leveraging BERT NLP models. This innovative feature enabled matching based on nuanced criteria such as client preferences (e.g., gender) and professional experience, further enhancing matching accuracy and customer satisfaction. – Developed a Retrieval-Augmented Generation (RAG) system prototype to automate question answering using the company FAQ and another one to improve data discovery within the data catalog. – Designed and implemented a digital twin of the marketplace operations to create a sandbox environment for testing and validating new matching algorithms, scoring methodologies, and for simulating KPI evolution. This proactive approach accelerated innovation and de-risked operational changes.
Data scientist x Data engineer x Data analyst
avr. 2019 - janv. 2023
3 ans 10 mois
Paris, France
– As the first data hire, I spearheaded the development of the data function from the ground up, consistently delivering data-driven solutions that directly impacted revenue, operational efficiency, and strategic innovation. – Dramatically improved client-professional matching algorithms, increasing the matching rate from a fluctuating 50-90% to a consistent 80-90%. This optimization directly translated to a significant revenue uplift, contributing hundreds of thousands of euros annually to the company's bottom line. – Provided strategic data insights to C-level executives, identifying key growth opportunities in service optimization and market expansion. Notably, recommended a shift from department-level to urban unit geographical granularity. This optimization improved resource allocation, reduced imbalances in professional/customer density, and enhanced service efficiency across markets. – Architected and implemented a robust and scalable data pipeline on Google BigQuery, leveraging Dataform for SQL-based ELT and Python on GCP VMs for advanced processing. This modern data infrastructure empowered data-driven decision-making across the organization and supported rapid business growth. – Played a crucial role in scaling the data team by mentoring and training junior data analysts. – Consistently spearheaded Research & Development initiatives, Dedicating 2-3 months annually to proposing and implementing innovative data projects, main contributor to the company's eligibility for French Research Tax Credit (CIR).
Teaching Assistant Professor
Université Claude Bernard Lyon 1
sept. 2015 - oct. 2018
3 ans 2 mois
Région de Lyon, France
Visiting Research Scholar
Centro Interdipartimentale di Ricerca "E. Piaggio"
sept. 2013 - juil. 2014
11 mois
Pise, Italie
Internship Research in Control Theory
CEA - Commissariat à l'énergie atomique et aux énergies alternatives
avr. 2013 - juil. 2013
4 mois
Région de Paris, France
Intern in the Robotics Departement
Universidade Federal de Santa Catarina
mai 2012 - août 2012
4 mois
Région de Florianópolis, BR
– Cinematic and Dynamic Modeling of a biped humanoid robot & design of a reference trajectory and a control system.
Formation
Université Claude Bernard Lyon 1
PhD, Control Theory
2015 - 2018
3 ans 2 mois
École normale supérieure
Electrical Engineering and Computer Sciences
2010 - 2014
4 ans 1 mois
Universidade Federal de Santa Catarina
Student Exchange Program
2012 - 2012
1 mois
Licences et certifications
LLM ZoomCamp
Délivré le : –
Building Batch Data Pipelines on Google Cloud
Délivré le : –
Fundamentals of Reinforcement Learning
Délivré le : –
Modernizing Data Lakes and Data Warehouses with Google Cloud
Délivré le : –
Machine Learning
Délivré le : –