António Mendes Rosa.

I’m a data engineer working at the intersection of analytics, AI, and the messy reality of production systems. Most of my days are spent moving data around — building pipelines, modelling warehouses, and helping teams get to insight faster.

The stack I reach for most: Spark, Kafka, Databricks, Snowflake, dbt, and Airflow — with PostgreSQL underneath everything when it makes sense. Lately I’ve been spending a lot of time on the architecture side, and on figuring out where AI actually pays off in a real data platform.

This site is the working notebook — short pieces on what I learn, what breaks, and the small craft decisions that compound. No newsletter cadence, no SEO games. New posts when something is worth saying.