Tonsser has spent 10 years building for young football players. Now we're expanding — and we're looking for a senior Android developer to help shape what comes next. If you care about craft, move fast, and want your work to matter to millions of athletes, keep reading.

The Role

• You'll join a small, focused team building a best-in-class companion app for the next generation of athletes. This starts as a 6-month freelance engagement with the clear intention of moving into a full-time position.

What we're looking for

• Senior-level Android experience — you've shipped production apps and can own decisions end to end.

• Kotlin Multiplatform (KMP) — you've worked cross-platform (iOS + Android) and know where shared code helps and where it doesn't.

• Jetpack Compose — comfortable building modern declarative UIs at scale.

• Consumer app background — experience with video, animations, and the kind of polish that users actually notice.

• AI-integrated workflow — you've used AI tools in your day-to-day and can bring that mindset to the team.

Please be precise in your application about:

• Your experience with KMP

• Your potential start date