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. The team works closely with hardware, software, and QA engineers across the bring-up process, so this role offers a rare chance to shape a product's foundations while working alongside experienced embedded and secure processor leads. 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. This involves an office-first setup  🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced  🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success  📚 A dedicated annual L&D budget of €2000 for your individual development, which can be used to attend conferences and/or advance your career through further education  💶 A corporate pension scheme where we match up to 20% of your contributions  🏖 Generous time off: enjoy 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: earn additional rewards by referring talented individuals to join the SumUp team About SumUp Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 38 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they i