Engineering
At SumUp , we believe small merchants are the heartbeat of our communities. By joining the Lending team , you'll help keep a core credit product running for businesses across Europe and Brazil, one that's already proven, already trusted, and still has plenty of room to get better.
As a Senior Backend Engineer , you'll be a technical anchor on the Servicing squad, operating with real autonomy to challenge existing patterns rather than just maintain them. This is a role for someone who's energised by complex, live systems, comfortable owning hard trade offs between speed and stability, and excited to help scale a regulated, high stakes platform without breaking what already works.
What you'll do
- Build and maintain backend services that power SumUp's lending platform in Go
- Strengthen observability and monitoring so the team can measure system health and catch issues before they become incidents
- Write integration tests that protect the reliability of every release
- Help adapt the platform to new regulatory requirements as SumUp expands into new markets
- Contribute to exploring and implementing new loan repayment flows
- Investigate production incidents and balance fast fixes with long term platform stability
You'll be great for this role if
- Strong knowledge of backend development, with a clear focus on code quality and performance.
- Experience questioning how an existing system works and proposing concrete, practical improvements.
- Comfort working with observability and monitoring tools to understand system behaviour and define meaningful metrics.
- Track reco