Wallapop App Redesign

Wallapop, Spain's leading marketplace for used goods with 15 million monthly active users, faced a critical navigation problem after seven years of rapid feature additions. User feedback revealed that the app's information architecture had become incoherent and confusing, with users struggling to complete basic tasks and "Back" being the most-tapped button. The outdated side menu navigation was reaching scalability limits and hindering product development.

The redesign followed a rigorous, research-driven approach spanning several months. The team established clear goals focused on creating seamless user interactions and defined success metrics including core feature usage, conversion rates, and customer satisfaction. They dedicated 90% of their effort to understanding problems through tree testing of the existing navigation, analyzing user reviews and NPS data, conducting card sorting exercises, and studying competitor benchmarks. Multiple concept iterations were tested early and often, with each version validated through user testing before proceeding.

The project employed parallel workstreams to reduce time-to-market, with technical implementation spikes running alongside design validation. The launch strategy included internal testing, beta testing with real users through diary studies, and careful coordination across all release aspects.

Key takeaways for product managers include: redesign only for user-driven reasons, not design trends; apply rigorous planning with clear scope and milestones; sequence research methods to deeply understand user mental models; test iteratively throughout the process; and parallelize work streams to accelerate delivery while maintaining quality.