# Senior Software Engineer at SumUp

- Company: SumUp
- Status: Open
- Workplace: On-site
- Location: Florianópolis, Santa Catarina, Brazil; São Paulo, São Paulo, Brazil
- Level: Senior
- Discipline: Backend
- Employment: Full-time
- Posted: 2026-10-21
- Skills: Engineering
- Apply: https://sumup.com/careers/positions/8690946002?gh_jid=8690946002

## Description

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

More SumUp roles: https://deviantjobs.com/companies/sumup