Germany onlyTonsser 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.
- Your experience with KMP
- Your potential start date
AM, CY + 5 more
AU, BD + 11 more