Senior Backend Engineer (Go) - Fintech, High Availability

SumUp; Greater London; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Private health insurance

Virtual Stock Option

28 days leave

L&D budget

Life insurance

Sabbatical after 3 years

Referral bonus

Salary-sacrifice commuter benefits

Job summary

SumUp is hiring for a backend role in our London-based team, focusing on core neobanking features, including bank transfers, open banking, savings, and payments. You’ll own features end-to-end, shaping architecture and driving reliability in a highly regulated fintech environment.

You’ll collaborate across product, design, data science, security, and operations to deliver scalable, production-grade services with strong observability, testing, and incident response practices.

Qualifications

• Backend experience building scalable production services.
• Experience with cloud platforms and container orchestration.
• Strong understanding of data storage technologies for high availability.

Responsibilities

• Build and maintain backend services for neobanking features (transfers, open banking, savings, payments).
• Own end-to-end features from scoping to deployment and maintenance using Go, Docker, and Kubernetes.
• Lead critical infrastructure migrations without disrupting live services.
• Collaborate with product, design, data science, security, and operations to inform architecture.

Skills

Go

Kotlin

Python

Tools

Docker

Kubernetes

AWS

SQL

NoSQL

Job description

SumUp is hiring for a backend role in our London-based team, focusing on core neobanking features, including bank transfers, open banking, savings, and payments. You’ll own features end-to-end, shaping architecture and driving reliability in a highly regulated fintech environment.

You’ll collaborate across product, design, data science, security, and operations to deliver scalable, production-grade services with strong observability, testing, and incident response practices.