That's a great example. There's nothing in those job listings that wasn't, conceptually speaking, in the job description of a system engineer or sysadmin thirty years ago.

In this usage of "DevOps" it's a buzzword, and I recommend you should avoid anyone who puts buzzwords in your job title, because it speaks volumes up front about their culture and values and clarity of thinking.

I really do like the descriptor Site Reliability Engineer, though, for exactly the same reasons.