Compared to many companies, this is one of the best processes I have seen. It's quite rigorous, and they do take extra care before hiring.

I had two phone calls before the on-site rounds. These phone calls were intended as direct screens, and I had to clear both of them individually.

On-site, I experienced:

• A pair interview
• A coding test
• One more one-on-one interview

The coding challenges ranged from Data Structures, Algorithms, System Design, and OOP, to some mathematical concepts.

I did not get past these rounds. Had I passed one, I would have had one more session of on-site interviews.

The interviews were all conducted by senior team members, who asked good, insightful questions.

Model a 2-player chess game as an OOP system.