HR staff did a phone screening interview. Then got todo an online recorded interview (behavioral and a technical question). An online interview with an engineer (there was a coding challenge). Then a final round interview that include about an hour technical interview and then less than an hour of behavioral interview. Want to give a HUGE shout out to Charles Schwab HR. I was very well treated by them. They were very communicative in answering my questions and they always keep me in the loop in each interview phase. They are the best!