DON’T WASTE YOUR TIME!

If you’re iOS developer and you feel your time is so precious, then I recommend you that please don’t waste your time on Booking.com. I guess they don’t have any openings and they keep rejecting candidates based on very tiny mistake in the interview, not sure if they want to hire Machines instead of humans. I feel they may be posting jobs to keep traction in the market.
 
I applied through online. They sent me online coding test. Then there was short call with hiring manager, followed by live coding problem solving with two iOS Developers from Amsterdam.

I had a problem solving round and it was really great and I was so confident that I would get into next round, however after the 3 days I got a rejection email saying that candidate did not tell correct time complexity in first attempt. Also Although I supported of edges cases, in feedback they say I only supported basic solution and it was very very frustrating, I swear I did not support only one last very complex edge case because we were already out of time but rest of the edge cases were supported.

Anyway we have to respect their decision as they’re GOD.

First I was contacted by a recruiter on LinkedIn and I agreed to have a short chat with her about my experience. The second phase was a hackerrank test with 4 questions (I posted them below). They can also be found online. The time limit was 75 minutes I think. For the third phase I had another chat with the HR person. Not really sure why, it was only to confirm that I want to move to Amsterdam. The fourth phase was a technical phone interview. In my opinion this part was the worst. It was also the one I failed. They ask you a algo/data structures question and a iOS question (I posted both below). I think that they don't allocate enough time for these questions, since in my case the algo question was a hard leetcode question. For the iOS question they just have you write code but without giving any sort of explanation. I know you have to ask clarifying questions but in this case every time I asked something it was answered with another question. The fact that the interviewers had the charisma of a match stick didn't help either. All in all it was a negative experience. I was even more let down at the end when they told me they don't write unit tests for the code that they write...