Staff Backend Engineer

Cardiff, London or Remote (UK)🌐 Remote💼 Full-time💰 $130,000–$130,000🗓 2026-07-13 → 2026-09-27

Core

Build and support backend services for a digital banking platform serving personal, business, and wealth management customers in the UK.

Role type

Staff Backend Engineer (L60)

Builds

Core banking, business banking, payments, and wealth management features

Domain

Fintech / Digital Banking

Deliverable

production ML models | product features | infrastructure

Required skills

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

Preferred skills

Experience with self-governing collectives, open source contribution, financial crime detection, AI/ML integration

Technologies

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

Responsibilities

Collaborate across disciplines to test hypotheses and make a difference to customers; work within squads alongside product managers, designers, and other engineers; contribute to open source software; join collectives doing innovative work with machine learning and AI at the forefront.

Seniority

Staff, hands-on IC with strategic impact

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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.