They have a very thorough process but there is a communication and coordination problem with the recruiters. They may act very sloppy and ruin the whole process. If you are lucky to come across with an organized one, he or she can save your world. But other than that people are usually very sweet.
I applied through a recruiter. I interviewed at Booking.com (Amsterdam) in Sep 2021
Interview
HR reached out, and didn't prepare you anything for the interview with hiring manager. After asking for more info, got ghosted. Very 'nice' way to attract good talent, but certainly I will not want to work for this kind of culture.
I applied through other source. The process took 2 months. I interviewed at Booking.com in Sep 2018
Interview
Exceptionally comprehensive with around 14 face to face, phone and video conversations that spanned 2 months in home location and Amsterdam. The recruiter was exceptional. The peers were amazing and the senior leaders were engaging. Boss was also engaging. Would have loved more time with senior stakeholders.