Senior Embedded Software Engineer

About the role

As a Senior Embedded Engineer in SumUp’s Hardware Tribe, you will be part of a small and highly skilled cross-functional team working alongside Hardware Engineers, Product Managers, QA Engineers, and more. You will play a central role in bringing up SumUp’s next-generation Android-based payment devices — from bootloader and kernel all the way through to framework integration and validation.

This is a relatively new role as SumUp transitions to the Android platform for its in-house hardware products. Unlike most Android devices, our hardware is a highly customised, security-focused payment device built from scratch — requiring a deep understanding of both embedded hardware and software.

The role is based on-site in our office in Berlin. We believe in the power of face-to-face conversations that happen organically when working next to one another.

About the team

You have probably used our card readers to buy a cappuccino or pay your hairdresser already. In Hardware, we are passionate about creating beautifully designed card payment devices and accessories that enable our merchants to start, run, and grow their own businesses. In doing so, we deal with a diverse range of engineering topics — industrial and electronic design, embedded systems, all the way to mobile apps and backend services.

We believe in open communication and constant learning over strict rules. If you’re looking for the chance to innovate and help millions of small independent merchants succeed — join us!

What you’ll do

Perform system bring-up for the Android Embedded platform, including bootloader, kernel, and driver integration

Develop and integrate SumUp custom modules — including kernel drivers, power management, and connectivity components

Maintain and improve the build system, ensuring stability and scalability across the platform

Debug hardware and software issues at the protocol level (I2C, SPI, UART, SDIO, etc.)

Carry out testing and validation to ensure new releas