Technology

We're experimenting with ways to measure, track, and improve the quality of our software.

We introduced the first progression framework for engineers about three years ago. But as the engineering organisation has changed, we found it was hurting, not helping career conversations at Monzo. This is what we did to fix it.

We've evolved our approach from supporting and developing individual engineers, to providing both excellent people support and technical leadership for teams and business areas.

How we've automated the process of scaling up our platform for our ever-growing userbase.

Our in-house Faster Payments gateway has been running since November 2019. This is a comprehensive insight into how we built it.

We’ve built a humane on-call rotation, that engineers actually want to join!

We recently finished a major networking project which let us control internal traffic in our platform. And we've been thinking about how we can add similar security to network traffic leaving our platform.

Our security team at Monzo are working towards a 'zero trust' cluster, where an attacker inside our cluster would have no power.

We use Vault for secret management and credential issuance, and we've always configured it with the Cassandra storage backend. To help us scale, we moved to the S3 backend. But it was crucial we kept Vault available.

It’s been running smoothly, handling every single Faster Payment that you’ve been sending in and out of Monzo!

When we first built Monzo on Android, we couldn't 'reuse' screens. We'd build them from scratch every time! To help us work faster, we've used a new architectural pattern called 'the Coordinator Pattern' in our codebase.

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.