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Senior Backend Engineer (Go, Ruby, Java/Kotlin) - Platform

Cologne, Germany · Engineering

The Mobile Platform team’s mission is to build tools and provide frameworks for SumUp’s product squads, allowing them to deliver multiple products to millions of small merchants around the world. Our work includes providing shared infrastructure in the form of session state handling, feature flags and identity services; introducing and maintaining shared services such as push notifications; governing the ways in which multiple product teams can integrate and launch their features; and evolving the design system that defines how various products are built. The team’s work spans across the whole SumUp product ecosystem giving you a unique insight into how a financial product for millions of merchants evolves. As part of this team, you’ll collaborate with colleagues from various SumUp offices and have a truly global impact.

We’re looking for a Senior Software Engineer to join the Mobile Platform team in our Cologne office.

What you’ll do 

  • Help build services that empower our squads to build delightful mobile experiences 

  • Write high quality, testable code, used by millions of people daily

  • Collaborate with other engineers, designers and product managers in your team and across other teams to develop simple-to-use and delightful solutions for our teams

  • Mentor other engineers in engineering principles, design, and implementation

To accomplish this, you’ll use these tools

  • AWS/Kubernetes

  • Jenkins

  • RabbitMQ/Kafka

  • OpenAPI

You’ll be great for this role of

  • You have experience with Golang.

  • You have 5+ years of programming experience in either Java, Kotlin, or Ruby.

  • You have 4+ years of DDD and API design experience.

  • You have designed and evolved service-oriented systems.

  • You have a solid CS background, with or without a degree, preferably with a strong theoretical understanding.

  • You have good writing skills and you’re able to communicate your ideas and designs effectively. 

Why you should join SumUp

  • You’ll work in an exciting and complex domain, affecting the everyday lives of millions of merchants.

  • You’ll collaborate with other talented people in designing and implementing solutions that delight and empower our merchants to pursue their passions.

  • We’re a truly global team of 2000+ people from 60+ countries, spread across 3 continents.

  • We get together regularly for breakfasts, team events, office parties and sports.

About SumUp

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.  

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.