Backend Engineer III

Monzo

Cardiff, London or Remote (UK)🌐 Remote💼 Full-time💰 $85,000–$85,000🗓 2026-07-15 → 2026-09-26

Core

Building resilient backend services for a digital banking platform serving millions of UK customers.

Role type

Senior IC backend engineer (distributed systems)

Builds

Core banking application code, data storage, and asynchronous messaging infrastructure

Domain

Fintech / Digital Banking

Deliverable

production ML models | product features

Required skills

Backend development, distributed systems, resilient software design, strongly-typed languages (Go, Java, C, Scala)

Preferred skills

Product mindset, data-informed decision making, comfort with ambiguity

Technologies

Go, Cassandra, Kafka, Kubernetes, Docker, Envoy Proxy, AWS

Responsibilities

Write application code, manage persistent data storage, implement asynchronous message queues, design resilient distributed systems

Seniority

Senior, hands-on IC

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About Monzo

Monzo is on a mission to build technology that connects the world. We are more than a platform; we are a global infrastructure that millions of people rely on for their daily lives, finances, and communication. This puts us in an incredibly unique position. We are the custodians of immense amounts of sensitive financial data as well as people’s money that are highly attractive to sophisticated adversaries and state-level actors.