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Security Engineer - Embedded Systems

Berlin · Hardware

We believe in the everyday hero. Those who have the courage to follow their passion and who have the strength and determination to realise their dreams.

Small business owners are at the heart of all we do, so we're creating 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 small business owners can be successful doing what they love. 

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 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.


  • Be part of a welcoming and international community of 1400+ 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, disability, age or any other basis protected by applicable laws or prohibited by company policy. SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind.

SumUp will not accept unsolicited resumes from any source other than directly from a candidate.