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Full Stack Engineer - Billing & Subscriptions

SumUp
Fullstack Developer • Vor Ort • Vollzeit • 📍 Berlin
📄 Originalanzeige ansehen (EN)

SumUp's Billing and Subscriptions team owns the billing engine, merchant wallet, and subscription experiences that underpin millions of transactions across 37 markets. The team is in an active phase of rebuilding and expanding this foundation to support new sales models, market expansions, and financial integrations. The role is a full-stack position with a backend focus, based office-first in Berlin.

Stack

JavaScriptMongoDBMySQLNext.jsNode.jsPostgreSQLReactRedisTypeScript

Responsibilities

  • ▹Build and maintain backend services and frontend interfaces across billing, contracts, and merchant wallet products
  • ▹Contribute to the refactoring of key billing components to improve reliability, data security, and alignment with the wider payments platform
  • ▹Support the expansion of billing and wallet capabilities into new markets, ensuring localisation requirements are met
  • ▹Take part in the weekly support rotation, handling incoming customer queries and maintaining platform stability
  • ▹Work closely with senior engineers and product managers to deliver features end-to-end, from implementation to production

Requirements

  • ▹Solid experience building full-stack applications with a backend focus
  • ▹Comfort with Node.js or Go (other backend languages considered)
  • ▹Experience with both relational databases (PostgreSQL, MySQL) and non-relational databases (DynamoDB, MongoDB, Redis)
  • ▹Practical frontend experience with React and Next.js, writing clean, typed code in TypeScript or JavaScript
  • ▹Strong written and spoken English communication, with the ability to give and receive constructive feedback
  • ▹A pragmatic problem-solving approach, able to make sensible trade-offs and write clean, maintainable code

Soft skills

Strong communication and constructive feedbackPragmatic problem-solvingAbility to unblock yourself and others

What we offer

  • ▹Annual L&D budget of €2000
  • ▹Corporate pension scheme matching up to 20% of contributions
  • ▹28 days of paid leave plus public holidays and special leave days
  • ▹Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches
  • ▹Break4me: 1-month sabbatical after 3 years of service
  • ▹Referral bonus

About the company

SumUp is a global fintech on a mission to empower small businesses with simple, affordable tools for payments, finance and customer relationships. Over 4 million businesses in 37 markets rely on SumUp, and the company employs more than 3,000 people from over 90 nationalities. SumUp is an Equal Employment Opportunity employer.

Languages: Angol (folyékony, írásban és szóban)