Etsy Machine Learning Engineer interview questions

After an initial screening with the recruiter, I was moved on to an interview with the hiring manager (another machine learning engineer). I was told this was not a technical interview, but it was 100% technical and included a live coding problem (LC medium). The interview lasted one hour and the interviewer wasn't very open to communication particularly on the live coding. In the end, I found an optimal O(n) solution that passed all test cases and tried to always think out loud. On the next day I received a rejection email with a no-feedback disclaimer, but the interviewer told me the next steps would be the on-site interviews (4, if I recall correctly).

I applied online and was contacted by their recruiter. I did a 1 hr phone screen talking about my past projects and basic machine learning questions (e.g., l1/l2 and their geometric interpretation). I answered all their questions but they didn't even show courtesy following up with me at all. I never received any rejection/acceptance email from them. I know some Chinese applicants who got hired as interns easily without even going through their hiring process. This startup is heavily governed by Chinese in a mafia-like style so stay away if you are from other nations.