Location: Berlin
Full-time | Senior | Tech: Golang, AWS, Kubernetes, PostgreSQL, Kafka

SumUp is a global fintech trusted by over 4 million small businesses in 36 countries. We provide simple, powerful tools that help merchants get paid, manage their money, and grow their business all in one place. Whether it's accepting card payments, sending invoices, or managing business accounts, our mission is to make financial services easy and accessible for small businesses everywhere.

Our Global Bank team is building the infrastructure behind SumUp's digital banking experience. Within this team, the Transfers Gateway squad plays a critical role in how money moves in and out of SumUp accounts. We power millions of transactions across SEPA and UK payment schemes, integrate with third-party banking partners, and ensure fast, secure, and compliant payment processing. From fraud prevention to system monitoring, we're focused on reliability at scale.

As a Senior Backend Engineer in our Transfers Gateway team, you'll design and scale distributed systems handling real-time payments across Europe. You'll lead technical discussions, own complex banking integrations, and drive improvements in performance, reliability, and observability. Collaborating with cross-functional teams, you'll shape the future of our financial infrastructure and help small businesses move money with confidence.

What You'll Do

Lead the design and implementation of reliable, high-scale integrations with SEPA and UK banking networks.
Drive architectural discussions, shape the technical roadmap, and influence key design decisions.
Improve system observability, test coverage, and operational excellence across our distributed systems.
Take ownership of end-to-end delivery, from planning and coding to testing, monitoring, and rollout strategy.
Collaborate with teams across Europe and Latin America to ensure seamless cross-border money movement.
Share knowledge, uphold engineering best practices, and mentor others to raise the technical bar.

You'll Be Great for This Role If You Have…

Solid experience as a senior backend engineer, using Golang, (Kotlin is a plus).
Hands-on experience with cloud infrastructure, relational databases (like PostgreSQL).
Experience using observability tools to proactively detect and troubleshoot issues.
Experience with highly scalable, robust, and fault-tolerant systems.
Good understanding of fundamental system architecture, design principles, data modelling, and API design (RESTful and event-driven services).
Experience with CI/CD and version control systems like Git.
Demonstrates exceptional code quality.
A collaborative, product-focused mindset and are comfortable working with global cross-functional teams and owning outcomes.
Curiosity and initiative, you are keen to learn, improve, and share knowledge to raise the bar for the whole team.

Nice-to-Haves

Experience in the fintech, payments or banking industry.
Experience with Docker containers and Kubernetes. AWS, Grafana.
Experience with Kafka.

Why You'll Love Working at 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.
Be part of a global tribe building a banking solution from the ground up and delivering impactful solutions to the real-life problems of millions of SumUp merchants all over the world
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)
Sabbatical program for tenured SumUppers
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
Health & wellness benefits: in-house fitness classes, gym in the office, subsidized Urban Sports Club and available psychotherapy sessions
A lot of other benefits such as Subsidized Public Transport Card, Kita placement assistance, Pension Scheme, Language Learning platform/courses etc.
Enrollment onto our virtual stock ownership program - you will own a stake in SumUp's future success.

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 simple and affordable tools that allow them to thrive. 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 inclusivity and a 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.