Senior Backend Engineer (Java/Kotlin) - Global Bank

Joining our Global Bank Tribe means you'll play a pivotal role in building SumUp's very own digital bank. You’ll be part of a global, autonomous, cross-functional team, with over 32 nationalities across Cologne, Berlin, São Paulo, Santiago, Sofia and Vilnius who love to take ownership, work with purpose, and are building the number 1 bank for small businesses.

Curious to know more about Global Banking Product at SumUp? Check this out!

As a Senior Backend Engineer (Java/Kotlin) you'll be responsible for facilitating the transition from a localized setup with regional banks to a unified Global Bank.You will have substantial influence on the design of our global platform, ensuring it's optimized for scalability, reliability, and security to meet the needs of our expanding user base. The challenge lies in executing all three tasks—redesigning, introducing new features, and scaling operations—simultaneously. If you're up for this multifaceted challenge, we'd love to hear from you. Apply now and be instrumental in shaping the future of our global banking platform.

What you’ll do

• Co-design and develop our global platform by engaging in collaborative efforts with cross-functional teams to optimize scalability, reliability, and security for our global banking platform
• Design REST APIs and build highly available event-driven systems. 
• Work in a global context with teams in Europe, the US and Latin America
• Collaborate with a cross functional team to clarify problems, outline opportunities, prototype solutions, ensure smooth deployment, continuous integration, and support existing functionalities
• Actively participate in selection of new tools, technologies and processes, code reviews and pair programming with other software engineers
• Become a subject matter expert and actively participate in product discussions to assist your team in delivering business value by making best backend-related decisions
• Continuously raise the bar by mentoring fellow backend engineers, drive engineering initiatives, adopt and actualize best practices with the team and foster a strong, collaborative engineering culture that emphasizes continuous learning

You’ll be great for this role if

• You have solid experience as a Senior Backend Engineer, proficient in Java, with Kotlin experience being an advantage.
• You have proven experience in software architecture and application design, with a track record of making architectural decisions and a deep understanding of fundamental system architecture and API design (RESTful and event-driven services).
• You have hands-on experience with CI/CD pipelines and version control systems, demonstrating your familiarity with DevOps practices.
• You feel comfortable working with SQL databases.
• You have a good understanding of modern cloud technologies (AWS, Docker, Kubernetes).
• You have experience with monitoring tools such as Prometheus, Grafana.
• You have a passion to write clear, concise and testable code that your team can understand, maintain and improve.

Any of the following would be considered a plus

• Experience in the fintech industry
• Prior experience with Kotlin 

Why you should join SumUp

• We’re a truly global team of 3200+ people from 80+ countries, spread across 4 continents
• The opportunity to work on large scale fintech products used by millions of businesses around the world
• 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.
• A dedicated annual Learning & Development budget (2000Euro / year) for attending conferences and/or advancing your career through further education
• Enrollment onto our virtual stock ownership program - you will own a stake in SumUp’s future success
• Access to the SumUp Sabbatical, our Employee assistance program for mental health
• We offer additional health insurance, a subsidized Multisport card, free shuttle buses from Joliot-Curie metro station and other great benefits.
• 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 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.