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Strong fit if you want senior backend ownership in fintech payments at SumUp in Berlin, building merchant and banking infrastructure rather than pure consumer apps.
As a Senior Backend Engineer at SumUp you would design and ship services behind card readers, merchant payments, and account products: APIs, data consistency, reliability, and integrations as SumUp scales banking and merchant tools across markets.
No—the listing marks remote as off; expect Berlin-based work.
Merchant card readers, online payments, and bank-account products for businesses, with ongoing expansion into consumer banking and related services.
British fintech founded in 2011; headquarters in London, with this senior backend role tied to Berlin.
Website: sumup.com
SumUp is a British financial technology company headquartered in London. SumUp’s primary product is an EMV card reader and a number of online payment and bank account system for merchants and businesses.
Public cache only — not an employee review.
Senior Backend Engineer - Accounts at SumUp in Berlin, Germany (Full Time, No Remote) Role Overview In the Global Bank tribe, you'll contribute to building the infrastructure for digital business accounts that empower small merchants globally. Your role involves designing and implementing a unified global infrastructure from scratch, ensuring scalability, resilience, and compliance across regions. You will work on migrating existing systems to a modern, event-driven architecture using Kotlin, Golang, Elixir, Java, AWS, Kafka, PostgreSQL, and Kubernetes. Key Responsibilities Contribute to the design and implementation of a newly architected global accounts platform. Migrate existing systems to a modern, event-driven, decoupled architecture that enables scalability and resilience across regions. Master event-driven architecture by building a truly decoupled, resilient system using Kafka. Prioritize technical design quality and deep problem understanding in Extreme Programming practices involving small iterations and daily deliveries. Skills & Qualifications Experience with Kotlin, Golang, Elixir, Java, AWS, Kafka, PostgreSQL, and Kubernetes. Proficiency in event-driven architecture and distributed systems design. Aptitude for problem-solving and a passion for delivering high-quality software solutions. Experience with observability tools like Prometheus, Grafana, and Honeycomb is a plus. Familiarity with AI-assisted development tools such as Cursor and GitHub Copilot. More About SumUp At SumUp, we're on a mission to become the most popular banking partner for small merchants globally. Our team practices Extreme Programming, focusing on technical design quality and deep problem understanding through small iterations and daily deliveries. Join us in creating an effortless, simple, and affordable experience for millions of merchants worldwide. Apply Today To apply, complete your application directly on this page, or you'll be redirected to the employer's application platform to finish submitting there.
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