Senior Payments Backend Engineer - Go & Microservices

SumUp; Sofia (NM); On-site; USD 48,000 - 78,000; Full time

Benefits offered by this job

Office in Sofia

Virtual Stock Option programme

€2000 L&D budget

25 days paid leave + service bonus

Health and life insurance

On-site yoga

Job summary

SumUp Sofia is hiring a backend engineer to build and maintain Payments Experience services, focusing on payout settings and market-ready APIs. You will work in a small squad, shipping features and helping migrate legacy Ruby services while improving reliability.

The role requires Go expertise, RESTful APIs, PostgreSQL, Kubernetes, and AWS experience. You will collaborate across languages and contribute to scalable fintech platforms used by merchants.

Qualifications

• Strong hands-on experience building applications in Go.
• Comfortable working within microservices architectures and RESTful APIs.
• Good knowledge of SQL databases, particularly PostgreSQL.
• Familiarity with containerised deployments using Kubernetes and experience with AWS.
• Multi-language codebase experience (Go and Ruby).

Responsibilities

• Build and ship features within the Payments Experience domain, including payout instrument flexibility per market.
• Support ongoing maintenance and operational health of backend services.
• Contribute to decommissioning a legacy Ruby service and clean up dependencies.
• Help remove Platform DB dependencies from the Bank Accounts service as part of migration.
• Participate in planning and refinement sessions, sharing estimates.

Skills

Go

REST APIs

PostgreSQL

Kubernetes

AWS

Ruby

Microservices

Git

Tools

Docker

Job description

SumUp Sofia is hiring a backend engineer to build and maintain Payments Experience services, focusing on payout settings and market-ready APIs. You will work in a small squad, shipping features and helping migrate legacy Ruby services while improving reliability.

The role requires Go expertise, RESTful APIs, PostgreSQL, Kubernetes, and AWS experience. You will collaborate across languages and contribute to scalable fintech platforms used by merchants.