I applied through an employee referral. The process took 4 weeks.

I will preface this by saying the interview process was well built. Coding rounds were very real-life based and fair, and interviewers were all lovely and pleasant. It was around 4 stages: an initial call, then a chat with two engineers, followed by a pairing session on reviewing a codebase. After that, the final set of interviews were based around system design and behaviours. It took Monzo around 2 to 3 weeks to give me an answer on if I'd passed. They finally replied telling me I had passed their process, but would not be offered a job at the current time due to the role no longer being opened.

The lead recruiter at the time made a deal with me to wait a few months and then take the next open position for the same role. However, this led to a multi-month chase, whereby he left his role, got replaced with a new lead recruiter, who acknowledged the process on an email chain and phone call but then went radio silent. It's a real shame as I was very impressed with the recruiters and the company as a whole, but messing people about who spent lots of time interviewing and prepping gave the vibe of somewhere that wasn't well organised.

The process was a review of a codebase and frontend-related web architecture, along with a few general chats about myself and how I work.