Senior Android Engineer
TandemBerlin, Germany
Posted April 20, 2026
Full Time
About the Company
Tandem is a leading global language learning community with 10 million members in over 180 countries.
Job Description
Tandem is seeking a Senior Android Engineer to join their agile, cross-functional team to architect, develop, and maintain the Tandem Android app. The ideal candidate will have 5+ years of experience with Kotlin/native app development, a passion for clean architecture and SOLID principles, and experience working on large apps with complex functionality.
Requirements
- 5+ years of experience with Kotlin/native app development
- Passion for clean architecture and SOLID principles
- Good experience of writing unit tests, including designing for testability and ideally TDD
- Experience working on large apps with more than 100,000 users and a good level of complexity
- Experience working in close collaboration with marketing or growth functions in a previous role
- Confidence to be the Android expert in the room and happy to both drive and critique technical designs
Benefits
- Passion for languages: German classes for team members
- Deep dive: budget for up to 6 'Deep Dive Days' per year
- Urban Sports Club gym memberships
- Regular team events
- Flexible working hours
- Relocation assistance for moving to Berlin
- Hybrid work approach
