Fullstack Engineer

Location: Copenhagen, Denmark The Global Bank tribe at SumUp, builds the financial tools that help small businesses manage their money more confidently, including Expenses and Making Tax Digital, two products that sit at the heart of SumUp's accounting and compliance offering. In this role you will join a small, senior squad, at a genuinely exciting moment: we starting with Making Tax Digital in the UK, where merchants can now submit Income Tax assessments digitally, SumUp's vision is to expand this into a full suite of Accounting tools - covering Income Tax assessment, VAT submission, and financial reporting across multiple markets. This is genuinely early-stage, high-impact work, and the Expenses and MTD squad is where it begins.

We are looking for a fullstack engineer who can own end to end delivery work across both the frontend and backend. You'll work closely with two senior engineers, a Product Manager, a Designer, and an Engineering Manager - with the reach and resources of a global 200 person tribe behind you, and product impact at scale.

What You'Ll Do

js and a history of delivering maintainable, user-facing frontend features Comfortable working in a small, autonomous squad where ownership is expected from day one Experience reasoning about API design, incremental migration paths, and architectural trade-offs, including familiarity with event-driven concepts and tools such as Kafka or RabbitMQ Clear and confident communication skills, with the ability to articulate technical decisions and feedback to product, design, and cross-functional partners You are curious about this domain and are a continuous learner Why you should join SumUp 🌎 Opportunity to work with 3000+ SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Copenhagen office (Vesterport station (within 5 mins walking distance to Copenhagen central station).