Best company I worked at looked at my personal site and Github, albeit briefly, ahead of time and didn't ask much if anything about it (IIRC). They asked more peer-level questions. Pretty casual. As my first job out of college they didn't expect much from me but later told me the other devs were impressed. Best group of devs I've ever worked with. All of them were pretty smart, wrote nice code, comments, knew how to use version control, and configuration management. They wrote their own JS framework that interfaced with a Java backend. I would later realize (in retrospect) this code was really well written and maintained.

Worst company I worked (work) for (but pays well) had me answer a few questions on a whiteboard. One of which was 'not even wrong' (the answer was: "HTML5 gave us the <strong> tag to replace <b>").

They were desperate for bodies after a bunch of people left. They also partake in the usual H1B/contractor games and wonder why they have shit code. Meh, my project is going well. If they have me work on their main .NET monstrosity though, I'll quit. Haha, jokes on them.