Full Stack Engineer (Billing & Subscriptions)

About the Team

The Billing and Subscriptions team at SumUp is at the core of merchant payment and management experiences. We own the billing engine, merchant wallet, and subscription functionalities that support millions of transactions across 37 markets. Currently, we are in an exciting phase of rebuilding and expanding this foundation to support new sales models, market expansions, and financial integrations, directly shaping how small businesses interact with SumUp.

What You'll Do

• Build and maintain backend services and frontend interfaces for our billing, contracts, and merchant wallet products.
• Contribute to the refactoring of key billing components to enhance reliability, data security, and alignment with our broader payments platform.
• Support the expansion of our billing and wallet capabilities into new markets, ensuring localization requirements are met.
• Participate in a weekly support rotation, addressing customer queries and maintaining platform stability.
• Collaborate closely with senior engineers and product managers to deliver features end-to-end, from implementation through to production.

Who You Are

• Solid experience building full-stack applications, with a backend focus. Ideally comfortable with Node.js or Go, though we are open to other backend languages.
• Comfortable working with both relational databases (e.g., PostgreSQL, MySQL) and non-relational databases (e.g., DynamoDB, MongoDB, Redis).
• Practical frontend experience with React and Next.js, with the ability to write clean, typed code in TypeScript or JavaScript.
• Strong communication skills in English, both written and spoken, enabling clear, constructive feedback exchange.
• A pragmatic approach to problem-solving, capable of making sensible trade-offs, unblocking yourself and others, and writing clean, maintainable code.

Why Join SumUp?

• Global Impact: Work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide from our Berlin office (office-first setup).
• Diversity & Inclusion: Be part of a workplace that values and promotes diversity, fostering an inclusive environment where all perspectives are respected and embraced.
• Learning & Development: A dedicated annual L&D budget of €2000 for conferences and career advancement.
• Financial Benefits: Corporate pension scheme with up to 20% employer match on contributions.
• Time Off: 28 days of paid leave plus public holidays and special leave days.
• Perks: Subsidized Urban Sports Club membership, Kita placement assistance, subsidized office lunches.
• Sabbatical: 1-month sabbatical after 3 years of service.
• Referral Bonus: Earn rewards for referring talented individuals.

About SumUp

SumUp empowers small businesses globally by providing simple, affordable tools to thrive. Over 4 million businesses in 37 markets rely on SumUp as their financial partner. Our diverse team of over 3,000 SumUppers from 90+ nationalities is united by global collaboration and an innovative mindset. Our core values shape our culture, driving success through inclusivity and continuous learning. We are committed to creating a safe and respectful workplace where everyone belongs. SumUp is an Equal Employment Opportunity employer, actively seeking and embracing diversity. We do not discriminate based on race, color, religion, sex, gender identity, sexual orientation, disability, age, or any other protected status.

Job Application Tip

We recognize that candidates may feel they need to meet 100% of the job criteria. Please note that this is only a guide. If you don't tick every box, it's okay – you'll have room to learn and develop your career at SumUp.