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(Senior) Full Stack Engineer

Berlin · Engineering

You will be a member of a small, cross-functional and co-located product team building applications and services that help millions of small businesses thrive. Our teams are highly autonomous and empower every member to have a significant impact on feature design, prioritization and delivery. As a highly-motivated and curious engineer, you will be able to help shape the future of SumUp’s engineering organization.

As a (Senior) Full Stack Engineer you will be working with technologies such as React with Emotion for styles in the frontend and Go, Node.js and Ruby in the backend. Our infrastructure is built on Kubernetes and Docker.


  • Take end-to-end ownership over what you build: from concept to creation, testing, documentation, deployment, monitoring, maintenance, and enhancement over time

  • Craft beautiful and accessible user interfaces with our component library, Circuit UI

  • Contribute to the development of your team’s microservice architecture

  • Participate in designing and planning feature implementation, as well as advocating for removing tech debt, fixing bugs, refactoring, and making iterative improvements

  • Write meaningful tests that give you the confidence to release at any time


  • You have a strong philosophy on testing and use this mindset to write robust, maintainable code.

  • You strive for clean code, and also know when and which shortcuts are appropriate and which are not.

  • You want to be part of shaping the product and having a direct impact on the business.

  • You enjoy and actively seek out learning opportunities and are not afraid to learn from and ask questions of more junior colleagues.


Don't be concerned if you do not meet 100% of the requirements. We are looking for the best overall team member.

  • Strong Computer Science fundamentals (though a formal degree is not required)

  • Solid understanding of design principles and creating clear and predictable REST APIs

  • Experience with relational databases, preferably Postgres

  • Experience or interest in DevOps topics, such as working with AWS, Docker, Kubernetes, and/or Jenkins

  • Comfortable working with the modern frontend toolchain, including bundlers and transpilers

  • Mindset towards scalability and resilience without overengineering based on current challenges

  • Open to learning different tools, frameworks, and languages to get the job done

  • 3+ years of backend experience with Go or Node.js

  • 2+ years of experience working on single-page applications, preferably with React and TypeScript


  • A dedicated annual budget for attending conferences and advancing your career through further education. 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.

  • Dedicated time every other week for side-projects and open source initiatives.

  • Annual hackathons, where the engineering teams from Berlin, Cologne, Sofia, and São Paulo gather together.

  • We have a close, welcoming and international community. We get together regularly for brunches, cocktail nights, football, office events, AMA sessions, training, German classes, and yoga classes.

  • Numerous other benefits such as Urban Sports Club subsidy, Corporate Pension Scheme, Kita placement assistance, relocation assistance, 2x per week subsidized office lunches, and a gorgeous place to work in the heart of Berlin at Alexanderplatz.


We believe in the everyday hero. Small business owners are at the heart of all we do, so we're creating tools that help them run their business. With a founders mentality and a 'team-first attitude' our diverse teams across Europe, South America, and the United States work together to ensure that the small business owners we partner with can be successful in doing what they love. 

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.