Senior Backend Engineer (Golang) - Global Bank

In the Global Bank tribe, we are building the infrastructure and core services needed to provide our merchants with a digital bank account that empowers them to be successful at doing what they love. Our goal is to become the most popular banking partner for small merchants globally by offering a high-quality banking experience tailored to their needs—effortless, simple, and affordable.

Joining the Global Bank tribe means playing a key role in helping us build SumUp's digital bank. You’ll collaborate with a global, autonomous, cross-functional team that refines an aspect of our product from concept to execution. Work alongside colleagues from 32 nationalities across Cologne, Berlin, São Paulo, Sofia, London and Vilnius, united by a shared commitment to taking ownership, working with purpose, and helping small businesses thrive.

As a Senior Backend Engineer (Golang), you will play a key role in helping us transition from a localized setup with regional banks to a unified Global Bank. A significant challenge will involve supporting the move to a fully distributed, event-driven architecture.

What You’ll Do

• Collaborate with a supportive global team to design and build a unified global banking platform, including high-level APIs for multiple regions and local implementations, ensuring high availability and observability.
• Develop and maintain highly available, self-healing, and resilient event-driven systems.
• Support the migration of systems and processes, ensuring zero downtime for users, and contribute to designing, implementing, and supporting high-value features that empower merchants globally.
• Improve test coverage for existing services and drive the end-to-end delivery of changes, including testing, observability, and monitoring.
• Shape and continuously improve our engineering culture by sharing ideas, refining best practices, exploring innovative solutions, and contributing to comprehensive documentation and tool selection.

You’ll be great for this role if you have

• Solid programming experience in Golang and are interested in working with additional languages such as Java, Kotlin and Elixir.
• Expertise as a Backend Engineer specializing in distributed and event-driven systems.
• Solid background in system design, data modelling, and API development.
• Practical experience with Kafka, Postgres, and SQL databases.
• Prior experience with modern cloud technologies (AWS, Docker, Kubernetes).
• Proficiency with CI/CD products such as GitHub Actions and ArgoCD.
• You take pride in your work, have a keen sense of ownership, and are dedicated to writing clear, maintainable, and testable code.
• Curiosity and enthusiasm for solving meaningful challenges for users and a commitment to collaboration and continuous learning.

Any of the following would be considered a plus

• Experience with monitoring tools - Prometheus, Grafana, Honeycomb
• Experience in the fintech industry

Why you should join SumUp

• Be part of a company that values diversity and celebrates unique perspectives.
• Work with a global team of skilled professionals in an environment that fosters collaboration, learning, and growth.
• 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.
• Career growth and learning opportunities: We invest in your development through regular training, mentorship programs, SumUp University leadership cohort and a yearly learning budget (2,000 EUR)
• 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
• Join a global team where you belong: Check out our D&I Initiatives and Employee Resource Groups such as Pride Club, SumAfro, Neurodiversity, Grupos Mais, Women in Tech, and more
• 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.