Backend Engineer - Transfers Gateway

The Transfers Gateway squad connects SumUp's internal systems to external financial networks across the EU and the UK. You'll help modernise existing systems while balancing reliability, correctness, and change, making architectural decisions that directly affect uptime and merchant experience across multiple markets.

What you'll do

• Build and maintain production money movement backend services, contributing to their delivery, observability, and ongoing maintenance.
• Own and deliver end to end 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.

What you'll need

• 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.

Nice to have

• 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.

What they offer

• 2,000 EUR annual learning budget plus regular training, mentorship, and SumUp University cohort.
• 25 days of paid leave plus special holidays.
• Health insurance through Gjensidige and life & accidental coverage from Ergo.
• Virtual Stock Option programme.
• Gym membership allowance.
• 1-month sabbatical after 3 years of service.