On-site interview with 5 engineers (a couple of leads), approximately 45 minutes each.

This interview was a bit heavy on programming and design. In my opinion, it was a bit too much for candidates with industry experience, as it's not reflective of most day-to-day work environments where engineers program about 90% of the time. It seems industry experience was not important.

It appears the expectation is to write bug-free and efficient code on challenging programming problems to pass the interview. Also, in my experience, interviewers seem to have a narrow focus on a specific solution to a programming problem; anything short of that is not considered good enough.

System design question: How to protect data exchange between end-station and server? Provide solutions for data privacy, authentication, and data collection and transfer optimization.