well the actual interview did not happen. They rescheduled phone interview about 3 times but i haven't received call from their engineer. At first I thought, it happens some times. I feel its always good to wait for a while before you inform HR when you don't get the call from the interviewer. In between HR will not reply to my call/email in a timely manner which delayed process. reschedule -> Nocall -> I will email/call -> again reschedule -> nocall -> I will email/call -> reschedule -> Nocall. Finally, one thing I understood they are so unprofessional. I wish they change it soon.

There was a typical initial screening call followed by coding exercises and culture fit interviews for 2nd and 3rd. People were nice and process was handled well. Once phone interview was over all other interviews were on zoom