Call with HR, then call with hiring manager and onsite 3 hrs interview with 6 people. The first interviewer was openly hostile and it was pretty uncomfortable. Did not make me want to have any working relationship with the group she was leading. Other 5 people were very pleasant and professional. My interview was on Monday and was promised to hear back by that Friday because they "like to move fast". I've been ghosted ever since which I think is unprofessional after on-site interview. Just like other reviewers mentioned it seems to be a very competitive environment which is not for everyone (I prefer friendly coworkers personally).