Technology

We built our “unordered concurrent” subscription knowing that we could eventually extend it to support ordering in Kafka

Monzo runs almost 3,000 microservices to power everything. A core part of being able to run all these systems and features safely is rate limiting. In this blog post we describe how that gets us to doing what we call “distributed rate limiting.”

We built a system to define scheduled jobs that moves away from cron and adds support for timezones, better monitoring and a more delightful developer experience

This blog talks about how our Monzo US team revamped the signup process for customers by experimenting with signup funnel improvements, increasing the rate of completion by a massive 400%

We’ve got a lot of value from our microservices architecture (2,800 and counting!), but this architecture is not without its challenges. One of those challenges is how to make sweeping library changes across all those services.

Gain an understanding of how International Payments are sent and received and how we process them at Monzo. We are making this seamless to customers whilst also having a strong focus on development experience

We think there are lots of benefits associated with AI, but we have a human approach to hiring. At every stage there is a person reviewing and making decisions to ensure we're able to bring the best people to Monzo.

We regularly have to create and manage secrets that grant very sensitive privileges, and so we’ve created a new process that makes it fast and easy for us to securely and verifiably perform all kinds of sensitive operations.

This blog talks about how we went 0-1 with our new Homeownership mortgage feature. It gives insight into how we transitioned from a mortgage-focused to a home-focused view, where equity (customer’s progress) sits at the heart of the experience.

This post is about how we built the Delightful Payments which directly replaced our P2P (Monzo-to-Monzo) and FPS (bank transfers) payment flows, including how we iterated on product in-parallel with design, and continuous feedback cycles.

This blog talks about how we protect our workloads against supply chain attacks, specifically by achieving bit-by-bit reproducible builds, and how we have adopted Nix an alternative to Docker for build environments.

This post is an overview of how we leverage incremental modelling, a data transformation technique which helps us scale sustainably as we blast off to 10 million customers 🚀

When we launched our new Monzo home screen, Katherine spent the past year focused on designing, launching and analysing experiments to understand how customers reacted to their new app. This blog explains how she measured change aversion.

Drawing upon the wisdom and practices of our user research team at Monzo, this blog post captures ways to scale user research impact, craft effective goals, and define clear metrics.

I’m Grace, and I joined Monzo in October ’23 as a Backend Engineer in Fincrime Business Banking. I’m here to convince you to apply for that role you really want, and about how exciting, challenging and rewarding changing roles has been for me.