Backend Engineer (Golang) - Transfers EU

At SumUp, we empower small businesses with simple, affordable tools to start, run, and grow. Our Global Bank teams build the financial services that help merchants manage their money and keep their businesses moving. For merchants, a transfer should feel simple. Behind that experience is a complex network of payment schemes, banks, providers, messages, certificates, reconciliations, and edge cases—all of which need to work together reliably. Transfers Europe squad is the integration layer connecting SumUp’s internal systems with the financial networks that move money across Europe and the UK. We build and run the backend services behind SEPA and UK transfer flows, helping move money accurately and reliably across external networks. As a Backend Engineer, you’ll take ownership of services that process real money. You’ll work on complex systems problems to ensure seamless integrations as we scale, while seeing a direct connection between your engineering decisions and merchant trust. If you enjoy understanding how systems behave under real-world conditions while improving them over time, we’d love to hear from you. Our tech stack includes Golang, AWS, Kafka, PostgreSQL, Redis and Kubernetes, supported by a strong observability toolchain with Prometheus, Grafana, and Honeycomb. We also actively use AI‑assisted development tools such as Cursor, GitHub Copilot, and others.

What you'll do

• Build and maintain production money movement backend services, contributing to their delivery, observability, and ongoing maintenance.
• Own and deliver well‑defined tasks and features, and contribute to larger projects within the team’s domain.
• Contribute to technical design and implementation, following established architectural patterns and best practices.
• Improve service reliability and quality by writing tests, enhancing monitoring, and following established delivery pipelines.
• Support the operation of the systems you work on by participating in on‑call rotations, incident response, and learning from post‑incident reviews.
• Apply a backend and systems perspective during refinement, raising questions about risks, dependencies, and edge cases.
• Collaborate closely with Product, QA, and other engineers to deliver end‑to‑end transfer and banking capabilities.

You'll be great for this role if you

• Have experience building backend services in a modern environment and supporting them in production.
• You are proficient in Golang and comfortable learning and working with other languages as needed.
• Are comfortable working with cloud‑based systems, containerized workloads, and automated delivery pipelines.
• Raise well-scoped pull requests, conduct thorough code reviews, and help maintain high standards of code quality and test coverage across the team.
• Understand the fundamentals of system architecture, data modelling, and API design, and are eager to deepen this knowledge.
• Are curious about how your work fits into the broader system and product experience.
• Communicate clearly and collaborate effectively with engineers, product managers, and other stakeholders.

What would be considered a plus

• Exposure to banking, payments, or financial systems, especially in regulated environments.
• Experience supporting systems with production traffic, including participating in incident response.
• Use of AI‑assisted tools to improve development speed, learning, or code quality.

Why you should join SumUp

• 🌎 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup.
• 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced.
• 🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success.
• 📚 A dedicated annual L&D budget of €2000 for your individual development, which can be used to attend conferences and/or advance your career through further education.
• 💶 A corporate pension scheme where we match up to 20% of your contributions.
• 🏖 Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days.
• 🩺 Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches.
• 🌴 Break4me: 1-month sabbatical after 3 years of service.
• 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team.

About SumUp

Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing a vast set of simple and affordable business tools to help them start, run, and grow their businesses. Today, over 4 million businesses in 36 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster an inclusivity and continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify. SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on 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. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Explore career opportunities with us and join a team driven by collaboration, innovation, and a shared vision of creating a world where everyone can build a thriving business. Discover more about our vibrant and inclusive work culture and how we work on our careers website, and follow our journey on LinkedIn and Instagram.

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.