I applied for a policy manager position, went through three interviews, did not get the job but they moved me to another position, still a policy one. Again, went through three different interviews - did not get the job once again and I was moved for the third time to another position in another team, which I was really hopeful about. I had to wait for three weeks and got an automated email rejection... After spending hours and hours on a total of ten different interviews for three positions. Not very professional from TikTok, but after I complained the recruiter organized a video call so that we could talk about it and he apologized for the email. Except for that "mistake" at the end of the process the rest was pretty smooth even though I had to repeat the same things over and over again for all those interviews since they were for different positions. TikTok is a very young company, sometimes they are not really sure of the kind of candidate they are looking for and change their minds quite often.

headhunted by recuriter > set up recruiter screen > submit CV > interview with hiring manager > 3-4 rounds of interviews you can't interview for multiple roles at a time unfortunately relatively fast responses if they are interested in you