[taway_1212]

What are the realistic expectations of in-office presence? Are there core hours when everyone is more or less expected to be present? Or is it accepted to hop in to the office every other day for a couple of hours of sync, and code from home otherwise?

[exfacebook]

I've worked in both modes. I've never heard of anyone being chastised for not being in the office enough --- but of course, that kind of feedback would be given in private.

I think the expectation is that you just be an adult about your work habits. Make sure that you're not slowing down the people you work with. It's up to you to figure out how to do that. One strategy is to just be in the office, but there are other options too.

(I'd say "teammates", but close collaborators aren't necessarily teammates at FB. You might work closely with someone every day and share only Zuck as the lowest common manager.)