Valentin Cathelain
Data in service of your business.
experience
clients
They trusted me
My goal: create value for your teams through 100 % reliable data and the right tools.
Data engineer with over 8 years of experience, I spent most of my career in startups and scale-ups: environments where you build fast, where needs shift constantly, and where every decision matters.
I step in when strategic data decisions need to be made: tool selection, architecture design, governance setup… These are the foundations that keep teams moving fast and businesses able to scale.
Retail, manufacturing, digital marketing, SaaS, finance: whatever the sector, I help my clients centralise their data, make it reliable, and turn it into real business value.
Retail
- 360° customer view
- Purchase trend analysis
- Operations monitoring
- Market basket and cross-selling analysis
Manufacturing
- Production monitoring
- Sensor and PLC monitoring
- Logistics visibility
Digital marketing
- Multi-channel data consolidation
- Precise attribution models
- AI assistant for upselling and retention
Case studies
E-merchandising Performance Tracking
Migration from SAP BI to Looker with a complete view of digital channel performance.
Energy Consumption Monitoring
Building an energy consumption tracking tool for a production facility, from sensor data ingestion to business dashboard.
Financial & HR Consolidation Across Subsidiaries
Consolidating financial and HR data from 8 acquired subsidiaries across 20+ heterogeneous sources into a centralised Snowflake platform.
Expertise
Data Platform & Infrastructure
- Modern data warehouses on the cloud of your choice
- Stack tailored to your context
- Technical foundations built to last (CI/CD, monitoring…)
Pipelines & Integration
- Ingestion from your sources (ERP, CRM, SaaS, internal databases)
- Pipeline orchestration and monitoring
- Data modelling aligned with your business needs
- AI-powered data enrichment
Analytics & Business Tools
- Data quality testing and monitoring
- Dashboard development with access management
- AI assistants for business teams
- User training and onboarding
Side projects
DW Auditor Python Package
An open-source Python package designed to simplify common data engineering tasks.
Schema validation, type and outlier detection, automated report generation.
Vélib Service Quality Dashboard
A dashboard analysing Vélib bike-sharing service quality, updated every hour. It monitors availability issues and visualises geographic patterns.
View dashboardLet's work
together
A project, an audit, a question about your stack? Get in touch directly.
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