Junior Backend Engineer (Golang) - Payments Tribe

The Role

We're looking for a Junior Backend Engineer (Go) to join our Payments Processing team in Sofia. You'll work alongside senior and mid-level engineers on a strategic consolidation of payment processing capabilities - covering both in-person and online alternative payment methods.

This is a structured, mentorship-driven role designed to set you up for long-term success. You'll work on real projects with meaningful impact - from card recognition improvements and smart transaction routing to PAR data solutions that power more accurate loyalty programmes.

 What You'll Do

• Work at a global fintech company with real impact on millions of merchants worldwide
• Mentorship-first culture — you'll work closely with senior and mid-level engineers from day one
• Modern tech stack: Go, Kafka, CockroachDB, PostgreSQL, AWS, Kubernetes
• Sofia office-based role in a collaborative, international environment
• Access a €2,000 annual L&D budget to attend conferences or advance your career through education.
• Enjoy 25 days of paid leave (increasing with tenure), plus paid vacations for special occasions and a 1-month sabbatical every 3 years.
• Benefit from extra perks like health and life insurance, co-sponsored Multisport cards, childbirth/adoption bonuses, discounts, a referral program, monthly food vouchers, flexible benefits, and more.

Please note: This role requires the right to work in Bulgaria. We are currently not able to support visa applications or relocation for this position at this time.

About us:

SumUp is a leading financial technology company, founded in 2012 with the goal of empowering small businesses around the globe. We’re the financial partner of choice for more than 4 million merchants in over 35 markets. We collectively build, plan and fine-tune the technology that drives SumUp and empowers small businesses around the world.

We believe in the everyday hero. Those who have the courage to follow their passion and who have the strength and determination to realise their dreams. Small business owners are at the heart of all we do, so we're creating powerful, easy-to-use financial solutions to help them run their business. 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 small business owners 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, colour, 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.