Shipping New Features Into a Live Marketplace

Zadaa was already the customer-favourite in Finnish peer-to-peer fashion resale — over 500,000 users and 4+ stars on both app stores before I joined. The challenge wasn't fixing something broken; it was adding new capabilities without disrupting what loyal users already loved. As Lead Designer, I designed new features that slipped into existing flows rather than replacing them.

Jukka is a versatile designer with a strong orientation toward research-based development — eager to help others outside the traditional UI/UX scope.

Jyri Vähä-Pietilä, Co-Founder & Chief Hacking Officer at Zadaa