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Embedded Security Engineer

Berlin · Hardware

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We are the leading mobile point-of-sale (mPOS) company in Europe. Our vision as a global FinTech company is to build the first-ever global card acceptance brand, and we are well on our way, as small businesses in over 31 countries around the world rely on SumUp to get paid. Our boldness, startup mindset, empathy and love for product foster a creative environment for our employees. We value an entrepreneurial spirit and seek to build lasting relationships among our employees. We know that a diverse and inclusive workforce keeps us competitive and provides opportunities for all. We believe that together we can help small businesses grow. To get there we are putting together an awesome team that is committed to one another and to our merchants. You could be our missing link! Help us bring card acceptance to the masses!

Your impact at SumUp

As part of SumUp's Hardware team, you’ll develop state of the art payment terminals and peripherals. Our goal is to envision and beautifully design our products, making sure they are compliant with payment and security specifications. We are passionate about our product and the vision of bringing new payment solutions to small merchants. You will be a member of a small cross-functional team, working closely with our hardware, software, industrial design teams, and manufacturing partners. You'll be primarily responsible for the new and continued development of security-related matters within an embedded Linux-based platform architecture.

What you’ll be doing in this position

  • Design, implement, deploy, and maintain security architectures and countermeasures to protect innovative SumUp payment terminals from a wide variety of attack vectors

  • Perform technical analysis, verification and validation of the software with a focus on strong security and compliance with standards in the payment industry

  • Work with security laboratories in order to define strong security concepts and get them verified

  • Act as an internal security subject matter expert, advocating for better security practices throughout SumUp

Main requirements

  • 5+ years of experience in embedded security

  • Strong knowledge of embedded Linux operating system

  • Demonstrated experience in creating secure systems to prevent security threats and attacks

  • Strong understanding of cryptography, protocol design, and analysis

  • Proficiency with programming languages in C programming language

Nice to have

  • University degree in Mathematics, Computer Science, Computer Engineering or a similar discipline

  • Knowledge of the payment industry standards such as PCI PTS and EMV

  • Experience with ARM TrustZone and OP-TEE or any other Secure Operating System

  • Knowledge on some scripting: Python, Perl, Shell script, etc.

  • Knowledge on TI Sitara processors or similar

  • Prior experience with mainlining patches for linux / uboot


  • Be part of one of the world's most exciting startups, on a mission to take over the world

  • We have a close, welcoming and international community of 1200 people from over 50 nationalities. We get together regularly for brunches, cocktail nights, football, office parties

  • Visa and relocation support for a smooth transition to living and working in Berlin

  • Budget for attending conferences and advancing your career. We encourage you to speak at conferences and give talks!

  • Weekly Lunch and Learn session, where the local engineering team exchanges ideas over company-sponsored lunch

  • Semi-annual off-sites, where the tech teams from Berlin, Sofia, and São Paulo gather together. In the past we've gone to Bulgaria and Greece and a castle in the German countryside

  • Football & Running teams

  • SumUp Corporate Pension Scheme

  • Free German classes & Yoga classes

  • All the startup swag you expect: kicker table, unlimited drinks & fruits

Apply now!

We're looking forward to meeting our next teammate! You can also choose whether to include a CV, a link to your Xing/LinkedIn, a link to your github, tech blog, or portfolio – whatever you think will give us the complete picture.

SumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. SumUp does not make hiring or employment decisions on the basis of race, color, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation,

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