Sofia, Bulgaria On-site Full-time

SumUp is hiring a (Senior/Mid) Software Engineer, Golang - Payments Platform

Responsibilities

  • Develop and enhance systems that handle high-volume transaction processing with reliability and scalability
  • Create and support backend services within a distributed microservices architecture
  • Help shape API designs for both internal systems and third-party integrations
  • Produce well-structured, testable, and scalable code with comprehensive test coverage
  • Engage in architectural planning and influence key technical choices
  • Work closely with engineering, quality assurance, and operations teams to deploy robust systems
  • Advance engineering standards by adopting best practices and integrating AI tools for faster development cycles

Benefits

  • Contribute to systems that support millions of merchants worldwide
  • Grow your expertise by solving challenging technical problems alongside skilled engineers
  • Join a team that selects technology based on project needs rather than fixed preferences
  • Collaborate across regions on large-scale financial technology products from the Sofia office, operating primarily on-site
  • Receive an annual €2,000 learning and development allowance for courses, certifications, or conferences
  • Take advantage of 25 paid vacation days annually, which increase over time, along with special leave and a one-month sabbatical every three years
  • Enjoy additional benefits including health and life insurance, subsidized Multisport cards, family support bonuses, employee discounts, referral incentives, monthly food vouchers, flexible benefits, and more

Work Arrangement

On-site

Team

Engineering team focused on building and evolving a global payments infrastructure

About company
SumUp

SumUp is a financial technology company that provides payment solutions for small and medium-sized businesses. From taking payments and processing orders to customer acquisition and managing finances, SumUp offers a range of tools designed to help businesses grow.

The company offers smart POS systems, card readers, invoicing, and financial management tools. With SumUp, businesses can accept payments in-person, online, or manually, all through a single platform. Over 4 million businesses worldwide have chosen SumUp as their payment partner.

SumUp also provides additional features like loyalty programs, gift cards, and business analytics through its ecosystem of products. The platform is designed to be user-friendly, with transparent pricing and no hidden fees, making it accessible for businesses of all types—from coffee shops and boutiques to salons and enterprise operations.

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Job Details
Department Engineering
Category backend
Posted 3 hours ago