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Backend Engineer (Kotlin / Java) - Merchant Bank, Bank Ledger

Sofia, Bulgaria · Engineering

Our mission is to build the infrastructure and core services needed to provide our SumUp merchants with a bank account that allows them to be successful at doing what they love.

As a Backend Engineer in the Merchant Bank Tribe, you’ll be part of the team building SumUp's own digital bank. You’ll be part of a local, autonomous, cross-functional team that can take an aspect of our product and perfect it from concept to execution.

As a Backend Engineer, you'll be responsible for building easy-to-use and reusable web applications to enable smooth and intuitive banking operations such as accounts management and regulatory reporting activities. You will work closely with our Product Managers, Frontend and Quality Assurance Engineers to create applications that meet and take advantage of the highest software development standards.

What you’ll do

  • Design, implement and iteratively create backend services.

  • Maintain and evolve the team core services.

  • Participate in API design and implementation for both internal APIs and those exposed to our third-party integrators.

  • Help your team deliver business value by taking decisions related to the backend and actively participate in product discussions and code reviews with other engineers.

  • Provide comprehensive documentation, good test coverage, and improve code quality.

  • Collaborate with other software developers, QA and DevOps engineers to ensure smooth deployment, continuous integration and support for the software we deliver.

You’ll be great for this role if

  • You have 5+ years of experience as a backend engineer.

  • You have relevant experience with OOP programming languages and would like to put your hands on Kotlin / Java.

  • You have experience with distributed and fault-tolerant systems.

  • You’re familiar with Spring, Micronaut, or another web MVC framework.

  • You have a passion for clean, maintainable, and testable code.

  • You understand fundamental system architecture, design principles, data modeling, and API design.

  • You have great verbal and written English communication skills.

Why you should join SumUp

  • We’re a truly global team of 2000+ people from 60+ countries, spread across 3 continents.

  • You’ll have the opportunity to put the foundations of the next generation banking platform.

  • You'll attend global offsites and regular team events.

  • You’ll receive a budget for attending conferences and external training. 

  • Additional health insurance. 

  • 25 days paid vacation + 1 accumulative day for each year of employment at SumUp.

About SumUp

We believe in the everyday hero.

Small business owners are at the heart of all we do, so we create powerful, easy-to-use financial solutions to help them run their businesses. With a founder’s mentality and a ‘team-first’ attitude, our diverse teams across Europe, South America, and the United States work together to ensure that the small business owners we partner with can be successful doing what they love. 

SumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. SumUp does not make hiring or employment decisions on the basis of race, color, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age, or any other basis protected by applicable laws or prohibited by company policy. SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind.

SumUp will not accept unsolicited resumes from any source other than directly from a candidate.