First round. The interview went pretty well. All questions were reasonable and adequate (i.e., no strange questions like "where you see yourself in 5 years"). Basically, in the first round, they want to know you as a person, and you should be able to talk about yourself or answer specific questions, not too short, not too long.
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The following metrics were computed from 3 interview experiences for the Booking.com Software Engineer role in Turkey.
Booking.com's interview process for their Software Engineer roles in Turkey is fairly selective, failing a large portion of engineers who go through it.
Candidates reported having very good feelings for Booking.com's Software Engineer interview process in Turkey.