I have a rough idea of how I would hire a software engineer, picked up from osmosis and of course from the interviews I have engaged in myself over the years, on both ends.

I have only a fuzzy idea of how I would hire for a DevOps engineer, in a way that doesn't boil down to a conversation and a keyword search over specific technologies I already know and hope they know too. I trust that judgment, but it won't scale to hundreds or thousands of CVs.

Blog posts, technical articles, etc. from companies who have successfully done this would be most welcome.