Benjamin Vaxelaire

Leading the data and the data team of Metz Métropole's mobility operator — 80 lines, 1,100 stops, 190 vehicles, 46 municipalities and 18 million passengers a year.

• Managing a team of 3 and supporting their upskilling on Microsoft Fabric and data governance
• Deploying a Microsoft Fabric platform on a medallion architecture, with governance and security designed in from the start
• Establishing data governance and a metrics dictionary with DataGalaxy
• Defining the master-data management (MDM) strategy to connect previously siloed departments
• Daily integration of 6 sources (SharePoint, SQL databases, flat files) — around 200,000 rows per day — into OneLake
• Designing, with the 6 business departments, a cross-functional Power BI dashboard (go-live imminent)
• Mentoring a work-study student on a conversational-agent POC (RAG): source preparation, chunking and vectorisation of the document base

StackMicrosoft Fabric · OneLake · Azure DevOps · Power BI · M365 · DataGalaxy

Teaching assignment in data visualisation for 2nd-year students of the Statistics & Decision Computing (SD) department.

• Leading 20 hours of hands-on data-visualisation labs on Tableau for 20 students
• Teaching best practices in graphical representation and dashboard design

StackTableau Software

Data consulting and engineering for a pharmaceutical client's BI platform: design and industrialisation of a metadata-driven datalake ingestion chain.

• Setting up the Talend Cloud environment, designing its architecture, administering the console (TMC) and GitLab
• Developing 10 pipelines feeding Snowflake from 11 varied sources (SQL Server, REST API, Microsoft Graph API, web scraping in Java, flat files, SFTP)
• Metadata-driven workflows loading several million rows and 30,000 SharePoint documents; 3,000 documents retrieved by web scraping
• Supervising 2 developers on Talend best practices
• Producing Power BI dashboards

StackTalend Cloud · Snowflake · SQL Server · GitLab · Power BI · Java

A practice dedicated to creative data visualisation, data storytelling and interactive 3D web technologies.

• Designing the 3D timeline of the 2024 Olympics schedule, awarded in a dataviz competition
• Web development of the immersive installation “Madotsuki_the_dreamer” (Le Fresnoy, Vidéoformes 2025)

StackReact · Three.js / React Three Fiber · WebGL · D3.js

Publisher of a real-estate project-management software for contracting authorities.

• Onboarding 3 new clients by migrating their data into Gesprojet
• Building interfaces between Gesprojet and Chorus Pro (public-sector invoicing) via REST API, JSON and SFTP
• Setting up custom invoice-validation and paperless workflows for around ten clients
• Software development and technical maintenance, plus functional user support

Stack4D · Talend · REST API · HTTPS · SFTP · JSON

Assignment for the major account Enedis (a Data & AI consultancy): the iPilot project — steering indicators for the industrial electricity-delivery chain.

• Gathering requirements and defining steering indicators for the delivery chain with the relevant departments
• Modelling and building an Oracle data warehouse bringing together around ten sources (distribution, meter readings, monitoring)
• Developing the data flows (Informatica PowerCenter) and around ten corporate dashboards (Tableau), within a 7-person Scrum team
• Running Tableau training workshops

StackInformatica PowerCenter · Tableau · Oracle · Scrum (Jira, BitBucket, Confluence)

A group of social-housing companies.

• Designing an ODS centralising IS flows and the data warehouse for the D'Clic customer portal, and developing the associated ETL (Shell, PL/SQL then Talend)
• Leading ~5 data migrations to PortalImmo Habitat, on scopes ranging from a few months to a year
• Creating and administering BI reporting (Tableau Software & Tableau Server)

StackOracle · PL/SQL · Shell · Talend · Tableau · ODS

An immersive documentary installation about digital identities, shown at the Vidéoformes 2025 festival (Clermont-Ferrand). Under its art direction, co-developed the web layer of the work — interactive components and data visualisations retracing the subject's online presence across multiple personas.

Web development · Data visualisation · Immersive installation · Documentary digital art

An interactive 3D timeline presenting the sequence of events of the 2024 Olympic & Paralympic Games, staged after the visual codes of a running track: scroll-based navigation along the time axis and filtering by discipline. 3rd place overall.

D3.js · Three.js · React Three Fiber · WebGL · Dataviz

Engineering cycle — Computer science, IS & business intelligence (validated course units, admission via VAP 85 in 2015)

Developer-designer — Information systems

Bachelor's degree in Physics & Chemistry