I was contacted by a Microsoft recruiter via LinkedIn who was hiring for Core Cleared positions (requires a Top Secret/SCI clearance) based in Seattle, WA and Herndon, VA. I did an initial phone screen with the recruiter who messaged me asking me generic background questions and telling me more about Microsoft's role in government cloud architecture. They give you a phone screen with a DS/Algo question in which I passed and was invited to go on-site in Seattle. The process of scheduling the on-site interview was fairly slow and tedious which was the most frustrating part. My on-site interview was scheduled for nearly 4 weeks after my phone screening. The on-site interview was 5 technical interviews (all DS/Algo, no System Design) plus lunch (which is still considered an interview, so do not let your guard down). This was also my first time interviewing on-site for a Big 4 company so I was extremely nervous and wasn't able to perform to the best of my ability on some of the questions I was given. Despite this, the interviewers were all very nice and tried their best to help me through some parts where I got stuck. Overall, it was a great learning experience interviewing for Microsoft and I enjoyed talking with everyone who was involved in the process.