The process took 3 weeks.

There were 4 steps, including a 30-minute call, 1 coding round, and 1 design round of 1 hour. It was unpleasant to make the design in person. They are not organized with a whiteboard, and it made the process nervous. Then the interviewer asked for a design that he didn't know about, such as designing Google Flights. He didn't know the real engine that you can buy from vendors and show different prices, and he started to make unclear requirements for the design, which led to not being able to correctly contact the needed task and scope of it. HR didn't notice. She makes some political notes while speaking, which is not appropriate and very unpleasant and less professional in my opinion.

There was a task of coding a multithreaded Pub/Sub system in Java in CoderPad. You can look it up on Google if you need to, but it is hard. It is not the everyday easy or medium LeetCode; I would say it is a hard one.

Then there was a system design round to design Google Flights, which had unclear requirements around it.