Backend Engineer – Global Banking Platform (Go/AWS)

SumUp; United States; On-site; USD 45,000 - 60,000; Full time

Benefits offered by this job

Virtual Stock Options

25 days paid leave

Gym membership allowance

Learning budget (2,000 EUR)

Job summary

SumUp in Vilnius is seeking an experienced Backend Engineer to modernize and scale banking services across regions. You will own from design to production, building reliable, high-volume systems handling ledgers and transactions in a globally scalable platform.

Proficiency in Golang and/or Kotlin, plus experience with PostgreSQL, Kafka, Docker, and Kubernetes, is highly desirable. This role involves collaboration across Risk, Treasury, Finance, and Infrastructure.

Qualifications

• You have solid backend experience building reliable, high-volume services and you think carefully about system design, APIs, data modeling, and how services interact.
• You are comfortable learning and working with multiple languages (Go, Kotlin, Elixir) and have a focus on maintainable, well-tested code.
• You are familiar with cloud environments (AWS), Docker, Kubernetes, and CI/CD practices.

Responsibilities

• Build and evolve SumUp's core banking services powering ledger operations and transactions, transforming regional systems into a unified global platform.
• Tackle complex distributed systems challenges to ensure resilient services under high transaction volumes.
• Improve observability, increase test coverage, refactor code for long-term maintainability, and introduce new architectural patterns without disrupting live banking operations.
• Contribute to architectural decisions by building ledger and transaction history systems for a globally scalable solution.
• Collaborate with Risk, Treasury, Finance, and Infrastructure to ensure compliant and reliable global operations.
• Take ownership from design to production, monitor performance, and continuously improve delivery of high-quality software at scale.

Job description

SumUp in Vilnius is seeking an experienced Backend Engineer to modernize and scale banking services across regions. You will own from design to production, building reliable, high-volume systems handling ledgers and transactions in a globally scalable platform.

Proficiency in Golang and/or Kotlin, plus experience with PostgreSQL, Kafka, Docker, and Kubernetes, is highly desirable. This role involves collaboration across Risk, Treasury, Finance, and Infrastructure.