Senior Android Engineer - Hardware

USAFull-time2026-09-23 → 2026-11-10

On-site · Germany

Core

Build and maintain Android applications for card readers, SDKs, and the SuperApp, focusing on payment flows and hardware integration.

Role type

Senior Android Engineer (Hardware/SDK)

Builds

Card reader applications, payment SDKs, and SuperApp features

Domain

Fintech / Mobile Payments / Embedded Systems

Deliverable

production ML models | product features

Required skills

Java, Kotlin, Android SDK development, Clean Architecture, Unit testing, Integration testing, Legacy code refactoring, Bluetooth Low Energy (BLE), CI/CD pipelines

Responsibilities

Develop Bluetooth Low Energy connections, implement online and offline payment flows, refactor legacy code, write unit and integration tests, collaborate on technical challenges

Seniority

Senior, hands-on IC

About SumUp

We believe in the everyday hero.Small business owners are at the heart of all we do, so we create powerful, easy-to-use financial solutions to help them run their businesses. With a founder’s mentality and a 'team-first’ attitude, our diverse teams across Europe, South America and the United States work together to ensure that the small business owners we partner with can be successful doing what they love.