Technology

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Working with backend services on iOS
How we refactored our iOS app to work better with backend services.
An update on our API
We want to wait until we can offer our developer community a truly awesome experience.
Terminal Decline: Why Some Payments Fail
Breaking down the common causes of declined card payments.
Practical Machine Learning With Event Streaming
Monzo’s Head of Data and Analytics walks through our recent advances in using machine learning to make predictions based on existing data.
Why Monzo Cards Aren't Working Today
A severe outage meant that Monzo hasn't worked for most of today. We wanted to let you know what happened and what we're doing to stop it happening again.
Monzo's Response to Cloudbleed
Last night, details of a Cloudflare security incident were published. While there is no risk to the vast majority of Monzo customers, we strongly believe in being transparent with our community.
Fighting Fraud with Machine Learning
How we have prevented £400,000 of fraud over the last 6 months
Designing a product with mental health issues in mind
How we're designing Monzo to be a powerful and unique financial service for our most vulnerable customers.
Laying the Foundation for a Data Team
Data is central to creating wonderful customer experiences and efficient internal operations. Take a look at how we're building our data team.
Building a Modern Bank Backend
This first post in a series about our platform explains how we’re building systems to meet these demands using modern, open-source technology...
Automated Testing &
Accessibility on iOS
Over the past couple of weeks, Josh has been working on improving our automated testing...
The Mondo API
We're excited to release the first version of the Mondo developer tools...