2 months ago
Sofia, BulgariaMid Level / Senior
Responsibilities
- Design and evolve reliable, scalable systems that process millions of transactions.
- Build and maintain backend services within a microservices architecture.
- Contribute to API design for internal services and external integrations.
- Write clean, maintainable, scalable code with strong test coverage.
- Participate in architectural discussions and drive technical decisions.
- Collaborate with engineers, QA, and DevOps to deliver production-ready systems.
- Improve engineering practices, including using AI to iterate faster.
Requirements
- Strong programming experience in a modern language such as Go, Java, Python, or Kotlin.
- Solid understanding of system design, scalability, and distributed systems.
- Experience building APIs and working with data storage systems.
- Ability to learn new technologies quickly and pragmatically.
- Strong problem-solving skills and a structured approach to thinking.
- Ownership mindset and collaborative approach to teamwork.
- Interest in incorporating AI into the development workflow.
- Nice-to-have experience with AWS, Docker, Kubernetes, event-driven systems, or Kafka.
Benefits
- Sofia office-based role with an office-first setup.
- €2,000 annual learning and development budget.
- 25 days of paid leave, increasing with tenure, plus paid special-occasion leave and a one-month sabbatical every three years.
- Health and life insurance, co-sponsored Multisport cards, childbirth and adoption bonuses, discounts, and a referral program.
- 100 EUR monthly food vouchers and 40 EUR flexible benefits.
Categories
About SumUp
SumUp builds card readers, point-of-sale apps, and payment tools for small businesses, along with accounts, invoicing, and online checkout. It sells hardware and earns fees on payment processing and subscriptions for software and services such as invoicing and loyalty. Founded in 2012 and headquartered in London, the company serves more than 4 million merchants across 30+ markets, and offers options like payment links and Tap to Pay.