Technology

We've been working on isolating the 1,500 services that power Monzo. The sheer size and complexity of our platform made this difficult. But by protecting us against compromised services, it makes Monzo more secure.

We recently designed a new system to manage secret information safely – from the keys that we use to sign your Mastercard transactions, to credentials for external services.

Making big decisions is hard. So at Monzo, we test our ideas out whenever we can. Here's how that works!

At Monzo, we want to build the best bank account in the world. Today, more than ever before, data is central to creating wonderful customer experiences and efficient internal operations.

A good response process can mean the difference between something being resolved in minutes and an issue developing into something worse!

The technology we use to create Monzo can play a key part in our mission to make money work for everyone.

We encountered an interesting bug in our Android app notifications. Here's how we fixed it.

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Some bank transfers aren't working. We're working on sorting it out asap.

We moved our remote procedure call (RPC) service mesh from Linkerd to Envoy to make Monzo faster.

OpenVPN is great, but there were some things we wanted to change.

We’ve built bespoke software from scratch, that helps us manage chats in the app. Here's how we implemented it on Android.

We prepared our systems for crowdfunding by shedding load, and built tools to help us monitor on the day.

More than 9,000 people opened their apps to invest in the first five minutes of crowdfunding. To make sure we were ready, we ran tests to simulate the extra load and upgraded our platform to cope with it.

We architected and built a scalable backend to support 36,000 investments.