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Backend Engineer (Verification)

Sofia · Engineering

As a Backend Engineer in SumUp you'll work with a small cross-functional co-located team to build tools that help hundreds of thousands of small businesses thrive. By shipping code early and often, you'll see the impact of your work on merchant's daily lives right away. You'll collaborate with experts in product, design, and operations to deliver mission-critical internal and external features that power the SumUp ecosystem.

The Verification/KYC squad is in charge of providing technological solutions both internal and external for non-human verification of our onboarding customers. We partner with some of the famous companies working in the electronic ID industry to empower our customers with quick, efficient and secure methods to breeze through our verification processes.

A few of the technologies you will be able to use in this squad are: Go, Kafka, RabbitMQ, PostgreSQL, Kubernetes, Docker, Terraform.


  • Participate in API design and implementation for both internal APIs and those exposed to our third-party integrators.

  • Design, implement, and iteratively improve new backend services.

  • Maintain and extend existing backend services.

  • Collaborate with other software, QA and sysops engineers to ensure smooth deployment, continual operation and support for quality software.

  • Coach and mentor other engineers to increase their abilities and productivity.

  • Actively provide code review feedback to other software engineers, considering both style and implementation.

  • Provide thoughtful and comprehensive documentation and testing for your features before shipping them.


  • You have experience with one or more of the following languages: Javascript on the Back (Node.js), Ruby (also on the Rails), Golang, Erlang/ Elixir, Java / Scala

  • You have experience with microservices architecture and Restful APIs

  • You have experience with Git

  • You have experience with SQL (PostgreSQL)

  • You have experience within Linux/Unix environment (comfortable working with a CLI)

  • You have solid OOP and FP skills

  • You have solid debugging, optimisation and problem-solving skills

  • You are self-motivated, proactive and engaged attitude towards projects

  • You have the ability to write clear and concise code that your teammates can understand and build upon


  • You'll have the opportunity to make an impact as we work in flat hierarchies

  • You'll have the space to drive your career here and take ownership of projects

  • You’ll have the chance to work on a diverse and international team

  • You'll be able to attend global offsites/hackathons/team events

  • You'll have competitive compensation and education budget.

  • Office relaxation activities such as yoga and massages

  • 25 days paid vacation + 1 accumulative day for each year of employment at SumUp

  • Additional health insurance


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. 

Apply now!

We're looking forward to meeting our next teammate :)