Developer.
Analyst.
Product thinker.

Germany's fastest-growing investment platform disrupted the market with a €1 flat fee and a clean UI. But two serious incidents — an April 2025 portfolio outage during a market selloff, a €9,686 tax error after an Nvidia stock split — reveal where the platform's depth hasn't kept up with its growth.

Full product teardown: business model, revenue streams, key actors, user personas, user journey map, what's working and what's broken — and 5 prioritised recommendations.

Wolt entered Germany in 2020 and has grown to 40+ cities — but Lieferando still holds 70–80% market share. Wolt gives users a promo on their first order, then no compelling reason to come back.

Full PM case study as Growth PM: actor map, user segmentation, impact calculation, primary research, behaviour analysis, competitor teardown vs Lieferando/Uber Eats/DoorDash, and four prioritised solutions.

15 million Germans use DB Navigator. The connection search is world-class. But BahnCard discounts that don't auto-apply, seat reservation hidden as a separate step, and fare classes explained by an icon nobody taps — drive abandonment at every step after "book."

Full PM case study as UX PM: actor map, business traveller segmentation, impact calculation, journey map, competitor analysis vs Trainline/Eurostar/SNCF, and four prioritised fixes.