Backend Engineer (Golang) - Balance Management

Overview

Backend Engineer (Golang) for the Balance Management Squad within SumUp’s Global Bank team, working on modernizing balance management and building a global transaction history service.

What you'll do

• Build and evolve core banking services supporting ledger operations and transactions.
• Address distributed systems challenges to keep services resilient under high transaction volumes.
• Improve observability, add test coverage, and refactor for long-term maintainability.
• Contribute to architectural decisions for ledger and transaction history systems.
• Collaborate with Risk, Treasury, Finance, and Infrastructure for compliant global operations.
• Own services from design to production, including monitoring and continuous delivery improvements.

What you'll need

• Solid backend experience building reliable, high-volume services.
• Proficiency in Golang.
• Experience with system design, APIs, and data modeling.
• Ability to write maintainable, well-tested code and follow CI/CD best practices.
• Comfort building, deploying, and running services in cloud environments using Docker and Kubernetes.
• Eagerness to work with relational databases under load.
• Collaboration skills across regions with clear communication and feedback.

Details

• Location: Berlin, Germany.