Apple

I applied by contacting a recruiter. They asked me to mail my resume, and within a week, I got a call from a recruiter to discuss the job opportunity. I was given a phone interview with a member from the technical team the next week. This interview

Facetime interview. Very quick and to the point. All technical circuitry questions with no connection to background or resume. Make sure you know your basic circuits and are able to answer difficult questions on the fly.

Difficult 4 rounds involving hiring manager, then recruiter, then team lead, then a day of 7 interviews across different team members. C++ and Python questions. Also had questions about sensor design and signal processing.