Software Engineer (Elixir) - Digital Bank

Elixir Software Engineer - Card Issuing Squad (SumUp Merchant Bank)


The mission of the Card Issuing squad is to create a globally accepted card which solves the daily challenges small business owners face everyday. Thanks to it our merchants are not only provided with instant access to their funds, but also have a full and transparent overview of their transactions. And this is just the beginning! We are planning many new exciting features and that’s why we are looking for a motivated and creative Elixir Engineer to join our team.

As an Elixir Engineer you will be a part of a cross-functional squad and have the chance to participate in building a completely new product from the ground up. We will encourage you to collaborate in the whole development and decision making process - you will be participating in brainstorming sessions with the team and transforming your ideas into features that empower small merchants across the globe. If you share our passion for changing the status quo by building revolutionary products in an agile way, then you would be a great fit for our team! 


  • Design, implement, and iteratively improve backend services in Elixir
  • Maintain and extend the card issuing system, responsible for the issuing and management of the SumUp card written in Elixir
  • Participate in API design and implementation for both internal APIs and those exposed to our third-party integrators
  • Help your team to deliver business value by taking decisions related to the backend and actively participating in the product discussions
  • Provide good test coverage, and improve code quality
  • Collaborate with other software developers, QA and DevOps engineers to ensure smooth deployment, continuous integration, and support for the software that we deliver
  • Actively participate in code reviews with other software engineers


  • You have previous experience as a backend engineer (5+ yrs)
  • You have experience with micro services, messaging queues, building REST APIs
  • You have relevant experience with Elixir and OTP (whether in a production environment or from pet projects)
  • You have a good understanding of software architecture and application design
  • You have experience with distributed and fault tolerant systems
  • You have a passion for clean, maintainable and testable code
  • You value team over individuals and autonomy within your team
  • You are transparent and enjoy working with the people around you
  • You are proactive and able to thrive in a fast-paced, dynamic environment


  • Are active in the Elixir community, contribute to open source or have personal projects
  • Enjoy mentoring fellow engineers and love sharing knowledge
  • Worked in an international, distributed team
  • Have experience with Docker and/or Kubernetes
  • Feel comfortable with Unix/Linux environments


 Why you should join SumUp

  • You’ll receive 25 days paid leave, plus 1 additional day for each year of employment.
  • You can take up to 10 days educational leave to expand your skill set.
  • We offer additional health insurance, a subsidised Multisport card, free shuttle buses from Joliot-Curie metro station and other great benefits.
  • You’ll participate in weekly Lunch and Learn sessions, where ideas are shared and discussed over company-sponsored lunch.
  • You’ll attend global offsites and/or hackathons.


About SumUp

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 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 the small business owners we partner with can be successful 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, colour, 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.