About Our Engineering Teams
We have over 400 engineers across Monzo who design and build our in‑house banking platform. We have big ambitions and technology plays a big role in creating a bank our customers want, so engineers collaborate across disciplines to solve interesting challenges throughout the company. These range from the products our customers use everyday to underlying infrastructure, security, payments and finance, customer operations, financial crime, and data.
As a backend engineer you’ll work in a squad alongside product managers, marketers, user researchers, designers, mobile engineers, web engineers, data analysts, business analysts, writers and more. Together you’ll build and support a particular part of Monzo. They include Core Banking, Business Banking, Wealth, Borrowing, Growth, Payments, Platform, Fincrime, Security & Expansion.
You have strong experience working on the backend of a technology product
You have a product mindset: you care about customer outcomes and want to make data‑informed decisions
You’re interested in distributed systems and writing resilient software




You have some experience with strongly‑typed languages (Go, Java, C, Scala etc.)
Cassandra for most persistent data storage
Kafka for our asynchronous message queue
Kubernetes and Docker to schedule and run our services
AWS for most of our production infrastructure and GCP for most of our data infrastructure
React for our public web apps and internal tools
We also have physical datacenters with presente cables to connect to various third parties
Take‑home task or pair coding exercise
A detailed blog on the process is available for extra details, hints and tips.
What’s In It For You Base salary depends on experience plus incentive awards tied to performance plus benefits. Flexible working hours: you can work enough hours to do your job well, at times that suit you and your team.
Learning budget of €1,200 a year for books, training courses and conferences.
If you have a preferred name, please use it to apply. We don’t need full or birth names at application stage.
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📌 Engineer - Software Engineering (Barcelona)
🏢 Monzo Bank
📍 Barcelona