Senior Backend Engineer
SumUpWarsaw, Masovian Voivodeship, Poland
Posted January 21, 2026
Full Time
About the Company
SumUp is a company that designs and builds tools to help merchants bring their businesses to life online.
Job Description
Join the Sell Online Tribe team as a Senior Backend Engineer and contribute to the maintenance and growth of critical online products. You will work on integrating products that provide essential features used across many other SumUp products.
Requirements
- 5+ years experience in backend engineering with Golang
- Strong understanding of fundamental system architecture, design principles, data modeling, and API design
- Strong experience with distributed and fault-tolerant systems
- User-level experience working with AWS and Kubernetes
- Good knowledge of Kafka & Postgres
Benefits
- PPK (Employee Capital Plan)
- Generous time off
- Break4me: 1-month sabbatical after 3 years of service
- Referral Bonus