Lead data engineer

📍 Paris (city center), on-site with 1 to 2 days WFH

🕐 Start: as soon as you are available

💼 Contract: full-time (CDI), open to freelancing for the summer

👥 Team:

3 co-founders (Pierre-Louis, CEO; Grégoire, CPO & COO; Thomas, CTO) 6 FTEs: 3 ML engineer and 3 ops + 5 freelances

✅ Your missions

As Lead Data Engineer and a founding member of the tech team, you'll play a central role in how we design, structure, and scale the data foundations behind our products. You'll report directly to Thomas (CTO & co-founder).

For the first 6 to 12 months, this is a hands-on role: you build the pipelines yourself. As the team grows around you, the role opens up into leading it — and we'll expect you to have earned that by shipping, not by organising.

Design, build, and scale our data ingestion, transformation, and structuring pipelines at scale.

Contribute across every stage of our data platform:

the anonymization pipeline (combining algorithmic approaches with human verification) to build digital twins of companies. the multi-modal data enrichment & curation pipeline. the datasets feeding our reinforcement learning (RL) environments.

Ensure data quality, lineage, versioning, and observability across the whole stack. Define our technical standards and take an active part in the structuring architecture decisions (tech choices, design patterns, scalability, DataOps). Work closely with the product, ML, and business teams to scope and ship new data projects. Hire, mentor, and grow the future members of the data team, building a strong data engineering culture at Ooak Data, with the option to take formal management of it once it's in place.