Senior Android Engineer- Hardware at SumUp
- Company: SumUp
- Location: Berlin, Germany
- Employment type: Full-time
- Posted: 2026-09-22
About the role
. Team description. The Hardware tribe builds the technology that turns everyday devices into secure, reliable card readers, from Bluetooth-connected dongles to fully in-house Tap to Pay on Android. You'll join a team solving genuinely hard problems: keeping payments working across flaky Bluetooth connections, handling online and offline flows without losing a transaction. It's a chance to go deep on Android engineering in a space where reliability really matters, since every merchant depends on these readers to get paid. What you'll do. Build and maintain Android applications for card readers, SDKs, and the SuperApp, covering both new features and improvements to existing systems. Work on Bluetooth Low Energy connections, online and offline payment flows, and Tap to Pay functionality. Refactor and modernise legacy code to improve reliability, performance, and maintainability.…
Apply on SumUp's official careers page: https://sumup.com/careers/positions/8794602002?gh_jid=8794602002