We’re waving goodbye to the complicated and confusing ways of traditional banking.
As well as personal and business bank accounts, we offer joint accounts, accounts for 16‑17 year olds, a free kids account and credit cards in the UK, with more exciting things to come beyond. With our hot coral cards and get‑paid‑early feature, combined with financial education on social media and our award‑winning customer service, we have a long history of creating magical moments for our customers!
Barcelona, Spain | Base salary for this role is depending on experience + benefits | Hybrid model: 3 days a week in the office
We have over 400 engineers across Monzo who design and build our in‑house banking platform. We have big ambitions for the future, and technology plays a big role in creating a bank our customers want, so engineers at Monzo 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, to name just a few areas. As a bank, there is scope for impact across a huge number of opportunities.
We contribute to open source software as much as possible. Our blog is a good place to learn even more about what we do!
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 infrastructure
React for internal web dashboards
We also have two physical datacenter sites with actual cables to connect to various third parties
This role is all about collaborating across disciplines to test hypotheses and make a difference to customers.



As a product 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. Money, Borrowing, Fincrime, Customer Operations, Platform, Personal Banking & Business Banking. They’re all looking for additional Backend Engineers right now, we do a standard interview process across all our collectives and at the end we will find the best match for you based on your skills, experience, preferences and aligning with the business need!
Our backend engineers have a variety of different backgrounds. you have strong experience working on the backend of a technology product
you have a product mindset: you care about customer outcomes and you 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.).
Our interview process involves three main stages:

Take home task or pair coding exercise
One of our engineers has written a detailed blog on their experience through this process, for extra details, hints and tips please see here .
What’s In It For You
We offer versátil working hours and trust you to 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
You can read more in our blog, 2024 Diversity and Inclusion Report and 2024 Gender Pay Gap Report.
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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📌 Staff Engineer - Backend Engineer (Barcelona)
🏢 Monzo Bank
📍 Barcelona