KeyStep

Backend engineer (Go)- Payments Experience

SumUp
Sofia, Bulgaria
1 day ago
full-time

Skills & Technologies

GoRubyBackendFinTechSalesDashboard

Job Description

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 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 small business owners can be successful doing what they love.

About the team

The Payments Experience team sits at the heart of how millions of small businesses receive their money. We build and maintain the backend services that power payout settings, payout instruments, and the tooling that keeps payments flowing reliably across 37 markets. Right now, the team is working through a meaningful technical challenge: migrating legacy services off an ageing platform database while continuing to deliver new capabilities for merchants and internal teams. This is a great opportunity to join a small, focused squad where your contributions are visible, your code matters, and there's real space to grow your craft in a complex fintech domain.

What you'll do

Build and ship features within the Payments Experience domain, including payout instrument flexibility per market and tooling to manage SUBA availability for sales teams

Support the ongoing maintenance and operational health of the team's backend services, keeping them stable and reliable

Contribute to decommissioning a legacy Ruby service that manages payout settings in the Dashboard and SuperApp, including cleaning up dependencies for a smooth transition

Help remove Platform DB dependencies from the Bank Accounts service as part of a broader migration effort

Take part in planning and refinement sessions, sharing technical assessments and effort estimates with the team

You'll be great for this role if you have

Strong hands-on experience building applications in Go,

Company & Role Analysis

JobSeeker+
Likely perks
Private MedicalPension25+ Days HolidayStock OptionsLearning BudgetFlexible Hours
Culture & working style

Neutral 2–4 sentence summary of what working at this company is like, drawn from public reviews and press coverage. Tone, collaboration style, pace, benefits highlights.

Market salary range

£45,000 – £60,000 (Glassdoor, Levels.fyi, 2025)

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