Building for reliability

Building reliable systems is a core tenet of good engineering. Yet, when reliable components are glued together, deviant behaviour often emerges. These can manifest as tricky bugs that take significant time and effort to identify, or broader incidents that hamper availability. Reliability needs to be considered across the sum of all parts rather than in just individual components.

The Monzo engineering teams have built the UKs largest digital bank from scratch over a period of many years. In this talk, Matej discusses lessons learned and the properties engineering organisations need to have to build and maintain reliability at the core.