As two of the Netherlands' leading telecom providers, Ben and T-Mobile required high-performance self-service mobile applications serving over 1.5 million active users. The challenge: translating complex account management, real-time data tracking, and add-on purchasing into seamless daily mobile experiences.

I led the UI/UX architecture and design systems for both native apps. I established a shared structural framework and intuitive dashboard hierarchy while applying distinct visual languages to each brand, balancing Ben's accessible tone with T-Mobile's sleek aesthetic.

The resulting UX system was built for extreme scalability and high-volume daily traffic. The core interaction model and screen structures proved so resilient that they still serve as the platform's foundation today, even after T-Mobile's rebrand to Odido.