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Tonsser Logo Tonsser · IT - Software Development

Senior Android Developer

65000.00 - 80000.00 EUR / Year · Job Posted April 20, 2026
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Job Description

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. This starts as a 6-month freelance engagement with the clear intention of moving into a full-time position.

Job Responsibility

Join a small, focused team building a best-in-class companion app for the next generation of athletes

Requirements

  • 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
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