MongoDB Senior Software Engineer interview questions

Had a chat with several people from different areas. In the last 3 rounds (among 6), I ended up going well on the first (coding), on the second, had a chit-chat with a manager and in the final one they had sent me a wrong link for the meeting. I ended up arriving 10 minutes later because I had to come back to the HR asking for the correct one. Although I solved the problem for the last round (even with less time), I never heard back from MongoDB. I totally lost my respect for the company. It seems it is part of the culture to ghost candidates - and according to Glassdoor, that seems to happen pretty often. A total waste of time and energy. After 6 rounds of interviews, being "ditched" without any single word from them sounds very unprofessional and, at the same time, a coward act.

Applied through the recruitment firm. Process described included 1 hr technical phone/zoom screen and 4 hr onsite interview. I didn't make it past the technical screen itself, so can't comment on onsite experience. The technical screen question was a LC hard question, and I honestly didn't expect that during a tech screen. I was only able to provide half working solution and explain my though process on how to solve it. But that wasn't sufficient for me to move on to onsite. If you are applying be prepared to answer LC hard questions (even during tech screen)