Senior Embedded Software Engineer- Hardware

Team Description

SumUp's Hardware Development team builds the physical products millions of small businesses rely on every day, and this role sits right at the start of a new chapter: moving our in-house hardware onto the Android platform for the first time. This isn't a typical Android device, it's a highly customised, security-first product built from scratch, which means the person joining will help define how the operating system, drivers, and secure processor come together rather than inheriting someone else's setup.

What You'll Do

• Support system bring-up for the new Android embedded platform, from bootloader through to kernel and framework.
• Integrate and maintain kernel modules and drivers, including power management and connectivity components.
• Contribute to build system integration across the platform.
• Debug hardware and software issues at the protocol level and help resolve critical issues found during testing.
• Carry out testing and validation to confirm the platform is stable and secure before release.

You'll Be Great for This Role If…

• Experience developing embedded systems with a strong focus on Android OS, gained over several years in a professional setting.
• Strong knowledge of the Android OS architecture, from bootloader (U-Boot, Little Kernel) and kernel through to framework and services.
• Hands-on experience debugging hardware interfaces at protocol level, including I2C, SPI, UART, and SDIO.
• Solid understanding of embedded security concepts such as Secure Boot, TrustZone (TEE), dm-verity, encryption, and hardware-backed key storage.
• Comfort working with Qualcomm Snapdragon or MediaTek platforms, and expert-level C programming for embedded Linux environments.

Why You Should Join SumUp

• Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office (office-first setup).
• Commitment to Diversity and Inclusion.
• Enrolment onto our Virtual Stock Option programme.
• A dedicated annual L&D budget of €2000.
• A corporate pension scheme where we match up to 20% of your contributions.
• Generous time off: 28 days of paid leave plus public holidays and special leave days.
• Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches.
• Break4me: 1-month sabbatical after 3 years of service.
• Referral Bonus.

About SumUp

Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe. Today, over 4 million businesses in 38 markets rely on SumUp as their financial partner. Our diverse team of over 3,000 SumUppers from over 90 nationalities is united by global collaboration and an innovative mindset.