About SumUp
SumUp provides simple and affordable business tools that help small businesses start, run, and grow. More than 4 million businesses across 36 markets rely on SumUp as their financial partner for payments, finance, and customer relationships.
Responsibilities
•Build and evolve core banking services for ledger operations and transactions, transforming regional systems into a unified, scalable global platform
•Tackle distributed systems challenges and ensure services remain resilient under high transaction volumes
•Improve observability, add test coverage, refactor code, and introduce architectural patterns without disrupting live banking operations
•Contribute to architectural decisions and build ledger and transaction history systems from the ground up
•Collaborate with Risk, Treasury, Finance, and Infrastructure teams to support compliant and reliable global operations
•Own services from design through production, monitor their performance, and continuously improve software delivery
Requirements
•Backend experience building reliable, high-volume services
•Proficiency in Golang and willingness to learn and work with other languages
•Ability to design systems, APIs, and data models and understand service interactions
•Ability to write maintainable, well-tested code and follow CI/CD best practices
•Experience building, deploying, and running services in cloud environments such as AWS using Docker and Kubernetes
•Eagerness to learn about relational databases that perform well under load and maintain data consistency
•Ability to collaborate across regions, communicate clearly, exchange feedback, and make technical decisions together
•Interest in building reliable financial services and banking
Nice to have
•Elixir
•PostgreSQL performance tuning, complex queries, schema design
•Event streaming platforms such as Kafka
•Observability stacks such as Grafana and Honeycomb
Conditions
•Compensation in Lithuania: 3,493 to 4,657 Euro Gross p/m for a Mid Level Engineer; 4,366 to 5,822 Euro Gross p/m for an Early Senior Engineer
•Offer may vary based on skills, experience, and hiring process outcome
•€2,000 Annual learning budget
•Virtual Stock Options
•25 Days of paid leave plus special holidays
•Health insurance through Gjensidige and life and accidental coverage from Ergo
•Gym membership allowance
•Training, mentorship programs, SumUp University cohort, and yearly learning budget
•Hack Days every second Friday and global Hack Weeks
•One-month sabbatical after 3 years of service
•Referral bonus
