Building a backend for our £20M crowdfunding round

Thanks for posting! I was part of the team that worked on this.

Monzo is a bank in the UK and last month we crowdfunded £20 million from 36,000 users through our own platform. We run the bank on our own software stack using Kubernetes & AWS, which we used for crowdfunding too.

Trying to integrate a high-traffic crowdfunding backend with our banking platform without disrupting our users’ day to day banking experience was tricky. Our bank is a distributed system that runs on hundreds of microservices. Building a high-traffic, reliable investment system using our architecture while requiring strong consistency on the amount invested was surprisingly challenging.