TikTok Software Engineer interview questions

I was scheduled for two technical interviews on two consecutive days. The first interview was fine but I didn't feel great about how I did. I didn't know that my second interview was cancelled till I showed up and no interviewer showed. I had to email the recruiter afterwards to find out that it had been cancelled.

The interviewer was kind during the first interview and even promised follow up and described next steps of the process. Then, ghosted. Nothing after that. No response. No contact or rejection email.