Just to clarify, at least for the SRE hiring process, you first have a single technical phone screening with a technical recruiter (not an engineer) which is literally on the phone. At least it was for me, no webcam or anything. It's a pretty short and back-to-back question/answer type of conversation similar to what is told by the article (although the article strikes me as odd and does not match my experience). After that you have a couple (or more if need) of "phone" (read: hangouts with webcam and shared doc) interviews with actual engineers and those are more technical and require you to write code as well. Then you'll be moved to on-site interviews.
(This is for Europe at least, I imagine it'd be similar in other areas but can't know 100%).