Senior Backend Engineer

SumUp(13 days ago)

Warsaw, PolandOnsiteFull TimeSenior$136,575 - $184,303 (estimated)Engineering

About this role

A Backend Engineer on SumUp’s Sell Online Tribe working on merchant-facing online products such as Payment Links, Virtual Terminal, and Unified Gift Cards. The role supports the growth and integration of online checkout products across the SumUp ecosystem and contributes to high-impact backend development that enables merchants to sell online. You’ll be part of a cross-functional team focused on delivering reliable, scalable mobile and web experiences for small businesses.

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Required Skills

Golang
Backend
System Architecture
Data Modeling
API Design
Distributed Systems
Fault Tolerance
AWS
Kubernetes
Kafka

+4 more

About SumUp

sumup.com

SumUp is a global financial‑technology company that provides simple, affordable payment solutions for small businesses, including card readers, point‑of‑sale systems and online payment tools. Millions of merchants use SumUp’s hardware, mobile app and web platform to accept in‑person and remote payments, track sales and manage day‑to‑day operations. The company emphasizes ease of use, transparent pricing and broad international availability, backed by customer support and integrations to help merchants grow.