Software Engineer Java - Payouts

Confirmed live in the last 24 hours

SumUp

Sofia, Bulgaria

On-site

Posted April 24, 2026

Job Description

WHO WE ARE:

We’ve come a long way from our origins as a small startup. Today, we’re a truly global fintech company, with over 3000+ people from 80 nationalities, spread across 22 offices on 4 continents. And we’re growing and diversifying faster than ever before.

SumUp enables businesses to get paid easily, process orders quickly, sell online instantly and manage their money more efficiently. We create the tools businesses need to make their business and their customer experience thrive.

THE TEAM:

Our robust payments processing platform, consisting of various sub-platforms, has powered SumUp’s global business for over a decade. A critical component of this platform is our Payouts team, operating within the post-processing domain to ensure our millions of merchants reliably get paid. This entire ecosystem is developed in Sofia by the Payments Tribe, composed of several autonomous, cross-functional, and co-located squads, each owning their part of the platform end-to-end.

We are currently in an exciting phase of scaling and improving existing products, while also developing innovative new ones. You'll make a significant impact by improving and co-creating our existing and new microservices architecture platforms, tackling complex scaling and new development challenges. Scalability and high availability are always at the forefront of our work.

You can join a team that values solid engineering and impactful solutions. You'll contribute to the design and development of our new Java-based payout platform, working with cutting-edge tech and directly influencing our product.

OUR STACK:

Java (minimal setup, Spring Boot), Kafka Streams, PostgreSQL/RDBMS, RestEasy, VueJS.

WHAT YOU'LL DO:

Co-design and develop our new Java payout platform.
Participate in API design and implementation.
Deliver business value through backend decisions and product discussions.
Ensure high code quality, test coverage, and documentation.
Optimize performance and scalability.
Actively participate in code reviews.

YOU'RE A GREAT FIT IF YOU HAVE:

3+ years of relevant Java experience
Experience with PostgreSQL/RDBMS and distributed systems.
Passion for clean, maintainable, testable code.
Good understanding of software architecture.
Bonus: Docker, Kubernetes, Kafka, Unix/Linux, CI/CD.

WHY SUMUP?

Real Impact: Your code directly empowers small businesses worldwide.
Growth: Individual learning budget, 10 days educational leave.
Work-Life Balance: 25 days paid leave, 1-month Sabbatical.
Great Benefits: Health/life insurance, Multisport, flexible benefits, Sofia office perks.
Global Team: Join a diverse team from 60+ countries.