Senior Backend Engineer

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About this role

Senior Backend Engineer Cologne, Germany; London, England, United Kingdom About the team At SumUp, we're on a mission to bring merchants and consumers closer together and help local communities thrive. Within the Consumer Mission, we're building a rewarding banking experience that connects people to the small businesses they love while tackling some of the most technically demanding challenges in fintech: critical infrastructure migrations, smooth, uninterrupted payment experiences, seamless open banking integrations, and high‑availability banking systems that can't afford to fail - all while enabling free transactions for our merchants. This role sits at the heart of that work - you'll take real ownership of backend services that are close to our consumers, directly shaping their everyday experience, with impact that's visible and felt across the entire platform. 🎥 Take a look inside our London office What you'll do - Build and maintain Backend services for Core neobanking features including bank transfers, open banking, savings accounts, and payment processing - Take end-to-end ownership of features and projects, covering scoping, design, development, testing, deployment, and maintenance, leveraging Go along with Docker and Kubernetes for container orchestration. - Take ownership of critical infrastructure migrations - including our banking core system transitions - without disrupting live customer experiences - Collaborate closely with cross-functional teams including product, design, data science, security, and operations) to understand requirements, provide technical insights, and contribute to architecture discussions that ship meaningful banking features end-to-end - Support fellow developers and actively help build a collaborative, innovative engineering culture - Shape

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