After initial screening from HR, it took almost one week to get the phone interview from the Hiring Manager. After five days, they asked for the in-person interview. My interview schedule was as follows:

• HR Screening (20 minutes)
• Hiring Manager Phone Interview (Technical, 1 hour)
• First Round In-Person Interview (Technical, 4 hours 30 minutes)
  • Met with 3 Senior Engineers, 1 Technical Lead, and 1 Hiring Manager.
• Second Round In-Person Interview (Technical, 6 hours)
  • Met with 4 Senior Engineers, 1 Hiring Manager, 1 other manager, and 1 Hiring Manager's manager.
  • Though this was planned to be a 5-hour interview, my Hiring Manager kept throwing problems at me as he was the last interviewer. It took 1 hour to solve and discuss the last problem he gave me. He himself took 1 hour 30 minutes for his interview. Meanwhile, he kept asking if I was okay for another 15 minutes.
• Origin Country Background Check (asked for documents, since my passport was not a US passport)
• Background Check in US (asked for documents)
• Employment Verification and Employment Background Check
  • Hiring Manager contacted 4-5 references by phone.
• Negotiation (took 3-4 days in negotiation itself)
• Acceptance of Offer
• H-1B Visa Transfer

Most of them were data structure and OS questions.

Problem-solving skills and general technical problem-solving approaches.