I applied online. The process took four weeks.
It was a drawn-out process. Honestly, don't bother if you have technical chops or a track record and are not part of diversity targets. They don't want to embrace the cutting edge. There is a mix of talented and not-so-talented people. Look at LinkedIn for an idea of the calibre: fluff-style, business-y descriptions carry merit, even if reading between the lines of what they achieved sounds really bad.
Are you female? If not, you have a completely different bar.
The following metrics were computed from 1 interview experience for the Monzo Lead Machine Learning Scientist role.
Monzo's interview process for their Lead Machine Learning Scientist roles is extremely selective, failing the vast majority of engineers.
Candidates reported having very negative feelings for Monzo's Lead Machine Learning Scientist interview process.