I had three rounds of interviews, First interview was with HR to see if the fit was right. Pretty basic. Second interview was with a manager (who I'd report to) which was a knowledgeable discussion, Third, was with the team I'd be working with. Different level engineers and another manager. They all quickly introduced themselves and all took turns asking questions. It took a full hour, They oddly didn't ask about my background experience at the beginning of the interview. I was told I'd receive a phone call by the end of the week and never did. This company completely ghosts people and it's very unprofessional. They should take in consideration candidates take hours out of their lives to interview for their company and deserve more respect.