Your salary sorted into Pots. Your spare change turned into savings. Your money, doing what it should with Monzo.
Visit monzo.com → On Hacker News Sep 2016 – Aug 2026
Security & Privacy 5Infrastructure & DevOps 5Tech Industry & Business 4Systems & Performance 3Networking & Internet 1
As a bank, we have a lot of secrets we need to protect to keep our customers and ourselves safe. These include private keys that only we know, which we use to digitally sign requests as coming from us (sort of like a private password). These private keys are super important and are used all over Monzo and when…
Our Security Infrastructure team introduces the principles we follow to build security in Monzo’s fast-moving engineering environment and how they work with other engineering teams to keep our customers and platform safe.
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.
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.
Our customers reasonably expect to be able to spend on their card, make bank transfers and pay their bills 24 hours a day, 365 days a year. Their lives don’t have downtime for maintenance so nor should we. We dedicate a lot of our engineering effort to minimise the risk of downtime during technical migrations and…