The Partnership and Enterprise squad is building the infrastructure that powers SumUp's partner channel, a business that supports around 800 active partners and is growing fast. As the squad's Senior Full-Stack Engineer, you'll take end-to-end ownership of the Partner Portal, the product that sits at the heart of how SumUp's partners manage their merchants, fees, and operations. This is an opportunity with real scope: you'll shape technical direction, collaborate closely with CRM engineers and product stakeholders, and ship features that directly reduce operational friction for the teams driving SumUp's sales growth.
What you'll do:
• Build and own the Partner Portal's frontend using React, TypeScript, and Next.js, creating fast, reliable, and well-structured user-facing experiences
• Design, build, and maintain the services and microservices that power the portal, ensuring reliability and high availability at scale
• Write and maintain back-end APIs, services, and data pipelines in TypeScript and Go that are scalable and built to support a fast-growing global platform
• Develop fee management functionality and other high-impact features that directly reduce the administrative burden on partner management teams
• Implement monitoring and alerting, and follow up on incidents to keep the platform stable and performant
• Collaborate with colleagues and stakeholders across the Partnerships team to identify areas of improvement, collect feature requests, and shape solutions
• Actively contribute to code reviews, team ceremonies, and chapter rituals, sharing context and knowledge across engineering disciplines to avoid silos
You'll be great for this role if:
• You have proven experience with TypeScript and React, building scalable, production-grade full stack…