How Monzo Keeps Its Banking App Running Like a Startup

In this episode, we dive into how Monzo, the UK digital bank, maintains a startup-like engineering velocity while managing millions of transactions daily. We explore their use of event sourcing and the CQRS pattern to decouple read and write workloads, and how they keep their core banking ledger simple despite scaling to over 9 million customers. Lucas breaks down Monzo's approach to feature flags and gradual rollouts—treating every deployment as an experiment. Luna chimes in with her own experience from a fintech that tried a similar architecture and hit unexpected pain points. We also touch on how Monzo's engineering team stays lean by focusing on a small set of well-understood primitives. If you're building or running a platform where correctness and speed both matter, this episode offers a concrete case study in trading complexity for control. #Monzo #Banking #Fintech #EventSourcing #CQRS #EngineeringVelocity #FeatureFlags #Deployments #Microservices #StartupCulture #LeanEngineering #DigitalBank #UKFintech #Scalability #BusinessAndTechnology #FexingoBusiness #BusinessPodcast #CTOPodcast Keep every episode free: buymeacoffee.com/fexingo