2 Phone interviews. Onsite 3 rounds. One with the Architect was the hardest. Learn all abou the CDN infrastructure and DNS error codes. Also dive deep into TCP and UDP protocol structure.

First, you received a call from the recruiter which would provide with more details about the job and benefits, then they will put you in another phone call with someone technical which would focus on ask about HTTP and DNS questions, finally, they will put you in a room for a long interview which includes video conference with people in a different geo or presence interview with local people, but in English.