I interviewed with Booking.com in May 2022.

The process starts with resume screening. If your resume seems to be a fit, you will receive an email with an invitation to a HackerRank coding challenge, which contains both multiple-choice questions and a few algorithmic coding problems to solve.

If you pass the HackerRank challenge, a recruiter conducts a short interview to ask about your motivation, your background, etc. If they find you a fit after this interview, you move on to the technical rounds.

• The first interview focuses on General Programming, Data Structures, Complexity, Popular Computer Science topics, etc.
• If you pass this one, there is another technical round focusing on System Design. You will be presented with a feature/component that should be designed, and you will do the system/architectural design while justifying and communicating your solution with the interviewers.
• If you pass this round, there's a final culture fit interview, and that's the whole process.

I generally had a very positive experience. The interviewers and recruiter were friendly and very knowledgeable. After each round, there was a feedback call where you get to know how you have done in the previous round, which all (except for one) were very quick.

Post-interview processes (handling the offer letter, contract, HR & legal stuff, etc.) were also taken care of very smoothly.

Most of the questions are similar to the ones you can find on Glassdoor or HackerRank interview preparation packs.