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Ruby Backend Engineer (Payments)

Sofia · Engineering

The Payments Self-service Squad is enabling the global SumUp merchants to run their business as smoothly as possible by providing them with accessible and intuitive self-services for accepting card payments. We strive to turn transactions into interactions and are inspired by creating products which our customers love. If you are excited by problem-solving and motivated to make an impact for our million merchants, come join our squad.

As a Backend Engineer, you’ll own a vital element of our system. You’ll drive the implementation of features and ensure they contribute to a great user experience and bring value to our growing customer base. You’ll also share your expertise to help us optimise product discovery and delivery.


  • Ship code which brings value to millions of users

  • Collaborate with product designers, product managers and other key stakeholders to clarify problems, outline opportunities, prototype solutions and build awesome products

  • Play a key role in the entire development lifecycle, from product discovery to delivery 


  • You have server-side development experience utilising Ruby outside and within the Rails environment.

  • You have experience in testing methodologies, e.g. RSpec or any other approach.

  • You’re a team player and strong collaborator, and are excited to share knowledge with the engineering team.

  • You’re a pragmatic programmer who understands what’s needed to get things done.

  • You love to learn and constantly improve your own skills, and aren’t afraid to jump into new things. Previous experience in the payment industry is a plus.


  • Our engineering team has a dedicated annual learning budget. We encourage you to participate in external events both as an attendee and a speaker.

  • We have a weekly hack-time for working on side projects or contributing to open-source initiatives.

  • We have annual offsites where our dev teams from around the world gather to share their tech experiences and work together on fun projects.

  • We arrange bi-weekly Lunch and Learn events, pair programming sessions and other fun team activities.

  • We offer some great benefits: 25 days paid vacation (plus 1 extra day for each year you work in SumUp), additional health insurance, office massages, yoga classes and a subsidised sports card.


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, 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.