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 Senior 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- Build and maintain full stack features across the Expenses and MTD products, working across the React.js frontend and Node.js/TypeScript backend
- Contribute to the major initiative to integrate Expenses directly into the Business Account transaction history, including API refactoring and frontend changes
- Take ownership of backend service reliability within the squad, including CI/CD workflows, Kubernetes deployments, and observability tooling
- Collaborate with Product, Design, and cross-functional squads to deliver clean, testable, and maintainable code, with a focus on user experience
- Participate in code reviews, contribute to architectural decisions, and help evolve the squad's engineering practices
- Solid proficiency in Node.js and TypeScript, with a track record of building and maintaining microservices
- Hands-on experience with React.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
🌎 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).
🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced
🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success
📚 A dedicated annual L&D budget of €2,000 for your individual development, which can be used to attend conferences and/or advance your career through further education
🏥 Health insurance and life insurance (available after 3 months of employment)
💼 Company Pension Scheme: SumUp contributes 9% and you contribute 4.5% (available after 3 months of employment)
🚆 DSB Business Commuter Card available via pre-tax salary
🥗 Subsidised meals in the office canteen
📱 Smartphone and subscription provided by SumUp
❤ Mental well-being support: access to licensed psychotherapists through SumUp Sessions, our confidential Employee Assistance Programme
🌴 Break4me: 1-month sabbatical after 3 years of service
🎉 Special leave days for life moments that matter, including birthdays, weddings, bereavement, and volunteering
🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team
🤖 You’ll attend global offsites, trips and/or hackathons (2023, 2024, 2025 and counting)
About SumUpBe empowered to do more that matters.
At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 37 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships.
Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify.
SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Discover more about our culture and opportunities on our careers website, and follow our journey on LinkedIn, Instagram, and TikTok.
Job Application Tip
We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.
Skills Required
- Solid proficiency in Node.js and TypeScript
- Hands-on experience with React.js
- Experience with microservices
- Clear communication skills
- Familiarity with API design and event-driven concepts
SumUp Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about SumUp and has not been reviewed or approved by SumUp.
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Leave & Time Off Breadth — Paid time off is positioned as a standout, including 22 vacation days that increase with tenure, public holidays, a quarterly Wellness Day, special leave, and a fully paid one‑month sabbatical after three years. This combination makes time-off benefits feel notably robust in the overall rewards package.
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Healthcare Strength — Health coverage is described as comprehensive, with medical plan options (including carriers such as Cigna and Kaiser) plus dental and vision. Company-paid life insurance and disability coverage are also part of the protection package in the U.S. materials.
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Retirement Support — Retirement benefits include a published 401(k) match formula that provides an employer match up to a stated cap. The clarity of the match structure supports straightforward evaluation during offer comparisons.
SumUp Insights
What We Do
SumUp believes that every business should have access to affordable, easy-to-use financial solutions, no matter their size. That’s why more than 3 million businesses worldwide rely on SumUp to run their business. What started out as one card reader has now turned into a range of payment hardware, banking solutions, marketing, and loyalty tools, invoicing, and so much more. From sales and marketing to product and engineering, our cross-functional US team works together to ensure that small business owners can be successful doing what they love.
Why Work With Us
SumUp USA is part of the global SumUp organization that stretches across multiple continents from Berlin to Sao Paulo. Our teams are multicultural, have a collaborative mindset and bold goals. Join our mission if you want to become part of the success story and help empower over 3 million merchants using SumUp already!
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