The crewAll three at AirHelp first. Then all three again at Deel: Mat arrived as the second data hire, brought Piotr in as Head of Data, and Maciej joined too.
Data functionDeel, taken from a Postgres-and-Metabase mess to Snowflake, Fivetran, dbt and Looker: dimensional models, self-serve dashboards, ad-hoc analysis requests down about 60%.
AttributionA marketing attribution model built end to end at Deel: paid channels ingested, touch attribution per registration, cost per channel on one screen.
PlatformA full migration off Scala onto dbt and Snowflake at Convex. Changes that took the old platform weeks now take hours.
Data trustEvent-driven claims ingestion on AWS at Convex, with a reconciliation layer built to prove the warehouse against the vendor’s own system of record, and alerting that catches the failure that looks like success: the pipeline that runs green while loading nothing.
Leadership & AIA 35-person data team built at Deel and a 25-person team built from scratch at AirHelp, around 100 analytics hires along the way. AI-adoption and semantic-layer programmes running in production today.