2 rounds using Google hangouts.
First round was initial discussion with the HR.
Second round was discussion with one of the founder(who was supposedly doing QA) and a backend engineer.
They gave a task to design/ prepare a Test plan for a complex medical workflow feature which was very abstract and with minimum details. The interviewers were friendly and the HR was responsive to all the emails. I prepared the tasks which obviously took more time than they suggested. They said that all the questions shall be discussed after my submission in the next round and hence I made some assumptions to complete my tasks. However, after 10 days of my task submission I received an email that I was rejected with no good reason. I advice the recruitment team to define proper tasks to assess an individuals skills.