The interview process includes:

• An online assessment on HackerRank: 5 questions in 120 minutes.
• Two phone screenings: each approximately 50 minutes long.
• An on-site interview, comprising:
  • Two technical interviews: each lasting 1 to 1.5 hours.
  • One HR interview: 45 minutes.

Phone interviews cover basic concepts about OS, computer systems, and C++ (they asked some C++ 11 probing questions). Some behavioral questions are also included.

On-site interviews include whiteboard coding (basic algorithm questions, slightly modified from LeetCode easy-medium level), implementing some data structures, and some system design problems. In my opinion, most of the on-site interview questions are well-prepared and challenging. Keep your mind clear.