Towards self-serve analytics: a year of data transformation at leboncoin

A year of data transformation at leboncoin: here is what we really learned.

leboncoin: sixty data people, thirty million users. In 2025 we brought the executive committee a three-year plan to modernise our data stack and open up access to data through self-serve. The answer: do it in one year. So we went back to the drawing board, chose Databricks, picked Coalesce as our data catalog, and created new data roles so that teams could become autonomous with data faster. The kind of ambitious programme that makes a good story.

A year later we are midstream. Databricks and the data catalog are deployed, and new use cases have emerged. What we really learned: the technical challenges, but also the organisational ones.

This talk covers what we concretely did: migrating our stack to Databricks, deploying a data catalog, building data products, launching AI agents for the Real Estate business teams, and setting up governance. How we managed to align KPIs and usage, and to give autonomy and accountability over data with the right guardrails.

Field feedback, candid, from the teams leading this data transformation.