Backend Engineer - Balance Management

Навыки

• AWS
• CI/CD
• Распределённые системы
• Docker
• Elixir
• GitHub
• Go

О компании и продукте

• At SumUp, we’re on a mission to empower small businesses around the world with simple, affordable tools to help them start, run, and grow. More than 4 million merchants across 37 markets trust us as their financial partner — and we’re just getting started.
• We’re a global team of 3,000+ people from over 90 nationalities, united by curiosity, collaboration, and care. Our core values and culture shape everything we do, fostering inclusion, learning, and belonging.
• SumUp is proud to be an Equal Employment Opportunity employer, committed to building a safe, respectful, and diverse workplace where everyone can thrive.
• Explore more about our culture on our careers site , or follow us on LinkedIn and Instagram .

Задачи

• Build and evolve the SumUp’s core banking services that powers ledger operations and transactions, transforming our regional systems into a unified, scalable global platform
• Tackle complex distributed systems challenges, ensuring resilient services that continue to perform under high transaction volumes
• Support modernization initiatives by improving observability, adding test coverage, refactoring code for long-term maintainability, and gradually introducing new architectural patterns without disrupting live banking operations
• Contribute to architectural decisions - build ledger and transaction history systems from the ground up, ensuring a globally scalable banking solution for our clients
• Collaborate with teams across Risk, Treasury, Finance, and Infrastructure to ensure smooth, compliant, and reliable global operations
• Take ownership from design to production, running the services you build, monitoring their performance, and continuously improving how we deliver high-quality software at scale
• You’ll be great for this role if you
• You write maintainable, well-tested code, follow CI/CD best practices, and take responsibility for the software you build from development to production
• You’re comfortable building, deploying, and running services in cloud environments like AWS using Docker and Kubernetes
• You’re eager to learn about relational databases that perform well under load and maintain data consistency
• You are a collaborator who enjoys working across regions, communicating clearly, exchanging feedback effectively, and making thoughtful technical decisions together
• You have a curiosity for building reliable financial services and banking domain
• It’s a plus if you have
• Knowledge of Elixir - some of our legacy services are written in Elixir, and while it's not essential, it would be useful if you've worked with it before
• Deeper PostgreSQL experience - we rely heavily on Postgres, so if you've done performance tuning, complex queries, or schema design, that's a plus
• Experience with event streaming platforms (Kafka preferred) and modern observability stacks (Grafana, Honeycomb, etc.)
• Why you should join SumUp
• We’re a truly global team of 3200+ skilled professionals from 92+ countries, spread across 4 continents. Join the team from our Vilnius office
• 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
• Time off: 25 days of paid leave, plus special holidays

Требования

• Our tech stack includes Go, AWS, Kafka, PostgreSQL, and Kubernetes, supported by a strong observability toolchain with Prometheus, Grafana, and Honeycomb
• We also actively use AI‑assisted development tools such as Cursor, GitHub Copilot, and others
• SumUp’s engineering culture is built around ownership
• We follow a “build it, run it, improve it” model, with strong observability and a focus on learning
• Engineers have clear scope and autonomy, with decisions documented, reviewed, and made collaboratively
• The Vilnius team is a core part of the Global Bank domain
• We own production systems, shape technical direction, and work closely with colleagues across SumUp’s global offices on critical merchant banking capabilities
• Join our Vilnius Team today ( Vilnius office )
• You have solid backend experience building reliable, high-volume services and you think carefully about system design, APIs, data modeling, and how services interact
• You are proficient in Golang and/or Kotlin and comfortable learning and working with other languages as needed, e.g. Elixir

Условия

• Peace of mind: health insurance through Gjensidige and life & accidental coverage from Ergo
• Stay active: gym membership allowance to help you keep fit on your terms

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