Senior Fullstack Engineer - Operations Platform

About the role

As a Senior Fullstack Engineer on the Operations Platform Team, you will play a key role in developing scalable software systems that improve the developer experience when integrating domain-specific backoffices, while also enabling Customer Support teams to effectively assist customers. You will help design and build high-performance systems and a unified API ecosystem that enables multiple teams to independently configure and launch new operational use cases with flexible business logic.

What you'll do

• Design, build, and maintain fullstack applications, with a strong focus on backend services, ensuring dependable and highly available production systems aligned with SumUp's microservices architecture
• Develop and maintain scalable backend services and APIs, while also contributing to intuitive and efficient frontend interfaces
• Contribute to shaping a long-term strategy that enables shared business processes to be used across multiple systems, triggered by automations, events, and user interactions
• Write high-quality, scalable code across the stack, following Platform standards and best practices
• Collaborate with stakeholders to identify pain points, gather requirements, and translate them into effective fullstack solutions
• Work closely with Identity, Verification, Data, and Engineers across Platform and Operations teams to deliver end-to-end features and improve overall user experience

What you'll need

• 5+ years of professional experience, with strong proficiency in TypeScript
• Solid experience building fullstack applications, with a backend-focused mindset
• Hands-on experience with modern fullstack frameworks such as Next.js, Remix, Nuxt, or Meteor, and strong proficiency in React
• Strong experience designing and building scalable backend services and RESTful APIs within a microservices architecture
• Experience working with SQL and event-driven architectures, particularly with Postgres and Kafka
• Good understanding of system architecture, software design principles, data modeling, and API design
• Experience mentoring or supporting other engineers in their growth

Nice to have

• Experience setting up or working with CI/CD pipelines and infrastructure tools like Terraform
• Experience with Go or an interest in learning it
• Experience writing technical design documents or architecture proposals
• Experience working on platform-driven development or building developer tools (DevTools)

What they offer

• Annual L&D budget of €2,000 for conferences or further education
• VSOP program — ownership stake in SumUp's future success
• Corporate pension scheme with up to 20% contribution matching
• 30-day sabbatical after 3 years of employment
• Urban Sports Club subsidy, Kita placement assistance, relocation assistance, subsidised office lunches