I applied online. The process took four weeks.
The process was very open, and my recruiter was really helpful during the process. If you look at their blog, you'll see a detailed article of the whole process in their attempt at demystifying the interview process. I definitely recommend reading it. Unfortunately, I failed at the systems design round as I don't have much experience in it, and I didn't have enough time to prepare. Overall, it was a good process, but the only thing that bummed me out was that I requested feedback. While my recruiter told me she had gone to start the process of getting it, she never ended up giving it to me despite any follow-ups.
The process was a recruiter call, an engineer call, a take-home coding task, a review of the task, a behavioral round, and a systems design round.
The following metrics were computed from 45 interview experiences for the Monzo Backend Engineer role.
Monzo's interview process for their Backend Engineer roles is very selective, failing most engineers who go through it.
Candidates reported having good feelings for Monzo's Backend Engineer interview process.