The process is a little overwhelming, and they actually warn you about it in the very first interview. Despite that, it was incredibly smooth. In my case, I had 8 interviews:
It can indeed seem daunting, but I can guarantee without any doubt—having actively looked for a new job for 2-3 months and conducted dozens of interviews during that period—that this has been the best process I've had so far. Every single person who interviewed me was extremely kind and friendly, and I did not feel nervous or intimidated at all.
I remember reading a Glassdoor review before I started the process that said something like, 'The process is mostly aimed at checking soft skills rather than hard ones; you can always learn hard skills with training, but the others are the tricky ones.' That is exactly what I felt during the interviews and why I accepted the offer (among other things).
Background experience:
Architecture, testing, and technologies related.
The following metrics were computed from 1 interview experience for the MongoDB Tools Engineer role in Spain.
MongoDB's interview process for their Tools Engineer roles in Spain is incredibly easy as the vast majority of engineers get an offer after going through it.
Candidates reported having very good feelings for MongoDB's Tools Engineer interview process in Spain.