I applied online. The process took four weeks.

After submitting my resume and cover letter, I got a phone interview. There was nothing really that technical: it was mostly commenting on the most relevant items on my resume. After some weeks, I got a coding exercise, to be done in any programming language but preferably in Go. Later, I needed to discuss my implementation with a Monzo engineer over the phone, getting into code and design details. Finally, there was an in-person interview at Monzo divided into two parts: The first one is general knowledge of networks, security, and data structures, and the second one is a design one, where you discuss how to make your coding exercise scalable. After less than a week, they notified me that I wasn't selected.

Implement a web crawler, preferably in Golang. There were bonus points for a fast implementation and testing coverage.