// Lead Data Science · Der Spiegel · Hamburg, Germany
10 years turning messy datasets into better products and smarter decisions — from fine dust sensors and marathon visualizations to ML-powered news recommendations and subscriber prediction at one of Germany's largest news orgs.
// selected work
Towards Data Science
The Audiencers
Talks & Webinars
Medium
DDJ, Data Viz & Citizen Science
Hackathons & competitions
// whoami
I'm Alex Held, Lead Data Science at Der Spiegel in Hamburg. Over ten years I've worked across analytics and ML engineering — building data products that improve the business, and making sure the insights behind them actually land.
At Der Spiegel I lead the development of ML- and AI-powered products: content recommendations, churn prediction, engagement scoring, and subscriber lifetime value modelling. I bridge editorial, product, and engineering — and spend a lot of time making sure results are understandable to people, not just models.