SumUp is a global player in FinTech supporting millions of merchants all over the world to be successful doing what they love. The SumUp POS is our free Point-of-Sale solution that merchants like cafes, shops, bars, or hair salons use to run and grow their business with features such as a product catalog, inventory management, business analytics, compliance support, loyalty features, and more. The POS is part of the  SumUp app that comes with our own register hardware, or can be used on tablet & phone devices.

In order to best serve these merchants, , our product development teams are growing and hiring Senior Backend Engineers. You will get to know the POS tribe through the hiring process and will be matched with one team during the hiring process. The teams hiring have different domains: Ecosystem & Partnerships, Fiscalisation, Catalog, or Reporting & Insights. Learn more about the job of a Senior Backend Engineer:

What you’ll do:

• Design and implement high-scale back-end services based on customer needs
• Use innovative techniques like Event Storming to design back-end services
• Maintain and evolve the POS ecosystem
• 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 back-end and actively participating in the product discussions
• Provide good test coverage and improve code quality
• Have fun documenting the system using Documentation as Code techniques like C4 Model, Architecture Decision Records, or OpenAPI specs
• Collaborate with other software developers and DevOps engineers to ensure continuous deployment and support for the software that we deliver using Infrastructure as Code tools
• Actively participate in pair programming and code reviews with other software engineers

You’ll be great for this role if:

• You have delivered JVM-based services for at least 5 years and you are ready to work with Kotlin on a daily basis 
• You have experience with distributed systems and event-driven architecture
• You have experience with SQL and NoSQL databases
• You have strong knowledge of concurrency and how to deal with it
• You have knowledge of software and architecture design patterns
• You enjoy pair programming
• You have experience in cloud-based environments (we use AWS)

The following would be considered a plus:

• You have experience with Postgres or Cassandra
• You have experience with Kafka
• You worked with continuous integration tools like GitHub Actions
• You have experience with functional programming
• You have experience with Container Orchestration tools like Kubernetes

Why you should join SumUp:

🌍 We’re a truly global team of 3200+ people from 80+ countries, spread across 4 continents

✈️  We offer visa and relocation support for you, your family, and even your pets to our office locations in Berlin or Paris

📚  A dedicated annual Learning & Development budget for attending conferences and/or advancing your career through further education

🚀  Enrolment onto our virtual stock ownership program - you will own a stake in SumUp’s future success

👩🏼‍💻  The opportunity to work on large scale fintech products used by millions of businesses around the world

💶  A corporate pension scheme 

🚵🏾‍♂️  Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, relocation assistance, subsidised office lunches and other location-tailored benefits

About SumUp

We believe in the everyday hero.

Small business owners are at the heart of all we do, so we create 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 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. 

Job Application Tip

We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.