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SumUp's Run & Grow tribe is seeking a Backend Engineer to design, build, and operate production-grade backend services, APIs, and integrations that power merchant acquisition, identity, marketing technology, operations, risk, and compliance systems. You will work primarily in Go, building event-driven workflows and distributed systems using Kafka and asynchronous processing. Your responsibilities include defining clear service boundaries, data models, schemas, and API contracts; owning technical work end-to-end from discovery through production follow-up; modernizing existing services to improve reliability through observability, security, and incident response; and collaborating across Product, Data, Operations, Compliance, Risk, Sales, Marketing, and other engineering teams. You will also review code and designs, mentor engineers, and make pragmatic technical trade-offs.
Run & Grow sits at the heart of SumUp's growth engine, turning complex challenges into reliable products and services that help SumUp serve millions of small businesses globally. The role offers the opportunity to work on high-impact engineering problems with a broad business view, shaping foundations behind important merchant journeys.
SumUp is a fintech platform serving over 4 million businesses across 36 markets, with a team of 3,000+ employees from 90+ nationalities. The company provides payment solutions, financing, and customer relationship tools to small businesses worldwide.
**Requirements:**
- Strong backend engineering background in Go, or typed-language generalist ready to ramp up quickly
- Experience designing APIs and distributed systems with clear contracts, versioning, and integration patterns
- Fluency in relational and analytical databases (PostgreSQL, Snowflake) with ability to choose the right tool for the use case
- Experience building Kafka-based, event-driven systems; understanding of event sourcing and CDC patterns
- Experience in auditable, high-trust systems where decisions must be traceable (fintech, payments, or similar domains)
- Demonstrated expertise in testing, observability, and incident response practices as first-class concerns
- Ability to take ownership of ambiguous problems and turn them into clear, scalable, maintainable solutions
- Strong communication and collaboration skills; ability to explain technical concepts and trade-offs to different audiences
- Value for pragmatic engineering, continuous improvement, mentoring, and reliable production operations
