I applied through an employee referral. The process took over a week.

There are four rounds.

• The first two rounds covered DSA, featuring a subset sum variation and a problem to flip $k$ zeros and return the maximum number of ones, alongside an LLD round. They went well for me.
• The third round was HLD. The interviewer asked me to design a flight booking system, and I started with functional and non-functional requirements, drawing and explaining everything that I could think of.

The interviewer was very less involved and did not give much review on the design or ask any counter questions. He kept agreeing to most things, but the next day I got the feedback as negative. I was shocked because I had already known this design before, and this was my best HLD round. They just waste candidates' time. It's not worth joining such an organisation.

There was a design of a flight booking system in the HLD round.