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About the Role
Join the Transfers Excellence squad to contribute directly to platform-level architecture that will shape how SumUp moves money at scale, impacting millions of small businesses daily. This role involves replacing market-specific implementations with a unified global transfer platform.
Responsibilities
- Build and maintain backend services for SumUp's transfer infrastructure with end-to-end ownership.
- Contribute to migrating services toward a unified global transfer platform.
- Raise well-scoped pull requests and conduct thorough code reviews.
- Participate in incident reviews and the on-call rotation.
- Contribute to the technical roadmap by participating in architectural discussions.
- Apply AI tooling to accelerate engineering workflows and raise team AI literacy.
Requirements
- Solid experience as a Backend Software Engineer in modern languages (e.g. Kotlin, Go, Java).
- Solid understanding of distributed systems and event-driven architecture.
- Experience with async processing and messaging tools like Kafka (or similar).
- Experience working with microservice architectures, including Spring Boot and event-driven patterns.
- Solid knowledge of relational databases and API design.
- Comfortable working in high-throughput, regulated environments where reliability matters.
- Defensive coding and attention to edge cases are essential.
- Clear communicator in written and spoken English.
- Collaborative approach to working across global teams.
- Curious about product impact, not just the code.
- Comfortable thinking about how backend decisions affect end-user experience.
Skills
- Kotlin
- Java
- Go
- Elixir
- AWS
- Kafka
- PostgreSQL
- Kubernetes
- Prometheus
- Grafana
- Honeycomb
- Cursor
- GitHub Copilot
- Distributed systems
- Event-driven architecture
- Async processing
- Messaging tools
- Microservice architectures
- Spring Boot
- Relational databases
- API design
Location
- Berlin
Work Type
- Office-first
Experience Level
- Backend Software Engineer
Benefits
- Virtual Stock Option programme
- Annual L&D budget of €2000
- Corporate pension scheme (company matches up to 20%)
- 28 days of paid leave plus public holidays and special leave days
- Urban Sports Club subsidy
- Kita placement assistance
- Subsidised office lunches
- 1-month sabbatical after 3 years of service
- Referral Bonus
About the Company
- SumUp builds simple, affordable financial tools that help over 4 million small businesses across 37 markets get paid, manage their money, and grow.
- Beyond card payments, SumUp offers a full suite of financial products including business banking, lending, invoicing, and money transfers.
- SumUp is on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive.
- Over 4 million businesses in 37 markets rely on SumUp as their financial partner.
- The company has a diverse team of over 3,000 SumUppers from over 90 nationalities.
- SumUp fosters inclusivity and a continuous learning culture, providing a safe space for personal and professional growth.
Equal Opportunity
- SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce.
- Hiring and employment decisions are not made 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.
- The company is committed to creating a safe and respectful workplace where harassment of any form is strictly prohibited.