Initial call,
Demo class
Final round with CEO
The interview process depends from role to role - However, meeting the CEO and the COO is an essential part of the entire process. For the members of the academic team, it is essential that there is a demo class. The questions might be given by them or you might be asked to prepare the same. Also, sometimes you may be asked to prepare and create questions or solve them to check your competency levels.
Overall the interview is very personal and aims at testing your overall attitude towards work and the job that you will be taking if you are extended an offer with the company. Do not stress too much about the interview - Just be yourself and you will be selected if you are the right fit.