Booking.com Software Engineer interview questions

The interview consisted of multiple steps: 1. A first call to assess experience and willingness to work at booking; 2. An HackerRank test with 4 problems to solve in about 75 minutes, you don't need to pass every test to continue, as they thankfully do look at the code instead of just the score; 3. A technical phone screen with 2 engineers, requires writing code on a site without running it, 2 problems were asked, along with time complexity of each solution. Lasts about 1 hour, with 10 minutes dedicated for asking any question to the interviewers; 4. An onsite interview comprised of 4 steps: - A first short talk with the initial recruiter (20-30 minutes) - A technical interview with 2 engineers, they ask 1-2 problems and you have to write the solution on a piece of paper (about 1 hour) - A design interview, they present a general problem and ask to design a possible solution, along with estimates so that you can scale the solution accordingly (about 1 hour) - A final behavioral interview with a team lead, mostly about the experiences, projects you worked on and some general questions on how you work/relate with coworkers After each step there was always a call with the initial recruiter to give feedback on how it went, the feedback given is quite detailed, they let you know exactly what they liked/disliked so you can work on improving it. Overall, a really good experience, I didn't get an offer due to some uncertainties in the last few steps, but was told to try again a few months later.