Senior Backend Engineer (Golang) - Bank

SumUp· 23 open roles

Location TBD On-siteFull-time56 years ago

Salaryest.

€80,000 - €140,000

Experience

Mid

Job Type

Full-time

Posted

56 years ago

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About This RoleAI processing…

At SumUp, the Global Bank team builds the core infrastructure and services that give merchants a digital bank account, helping small businesses manage their money easily and reliably. The Balance Management Squad sits at the core of the Global Bank Platform. Right now, our team is completing a major milestone: consolidating and modernizing our balance management system in Europe. The next big step is creating a global transaction history service; a single, shared platform used by all regions to give merchants consistent and transparent views of their financial activity. As a (Senior) Backend E

Key Responsibilities

1
Build and evolve the SumUp's core banking services that powers ledger operations and transactions, transforming our regional systems into a unified, scalable global platform.
2
Tackle complex distributed systems challenges, ensuring resilient services that continue to perform under high transaction volumes.
3
Support modernization initiatives by improving observability, adding test coverage, refactoring code for long-term maintainability, and gradually introducing new architectural patterns without disrupting live banking operations.
4
Contribute to key architectural decisions - build ledger and transaction history systems from the ground up, ensuring a globally scalable banking solution for our clients.
5
Collaborate with teams across Risk, Treasury, Finance, and Infrastructure to ensure smooth, compliant, and reliable global operations
6
Take ownership from design to production, running the services you build, monitoring their performance, and continuously improving how we deliver high-quality software at scale.
7
You have solid backend experience building reliable, high-volume services and you think carefully about system design, APIs, data modeling, and how services interact.
8
You are proficient in Golang and comfortable learning and working with other languages as needed, e.g. Kotlin or Elixir.
9
You write maintainable, well-tested code, follow CI/CD best practices, and take responsibility for the software you build from development to production.
10
You're comfortable building, deploying, and running services in cloud environments like AWS using Docker and Kubernetes.
11
You're eager to learn about relational databases that perform well under load and maintain data consistency.
12
You are a collaborator who enjoys working across regions, communicating clearly, exchanging feedback effectively, and making thoughtful technical decisions together.
13
You have a curiosity for building reliable financial services and banking domain

Requirements

Knowledge of Elixir - some of our legacy services are written in Elixir, and while it's not essential, it would be useful if you've worked with it before
Deeper PostgreSQL experience - we rely heavily on Postgres, so if you've done performance tuning, complex queries, or schema design, that's a plus
Experience with event streaming platforms (Kafka preferred) and modern observability stacks (Grafana, Honeycomb, etc.)

Perks & Benefits

Career growth and learning opportunities: We invest in your development through regular training, mentorship programs, SumUp University leadership cohort and a yearly learning budget (2,000 EUR)

Health & wellness benefits: in-house fitness classes, gym in the office, subsidized Urban Sports Club and available psychotherapy sessions