I build the data and AI systems behind global marketing.

I’m Morten Lileng — Global Head of Product Engineering at dentsu, where my teams build the identity and data platforms behind marketing for hundreds of the world’s biggest brands.

Most of that work lives at the intersection of large-scale data engineering, cloud platforms like Snowflake, and applied AI. This site is where I think out loud about it — the decisions, the trade-offs, and the things I wish someone had written down before I learned them the hard way.