I think it's much different for established companies vs. unestablished companies. As someone at a startup which hasn't launched yet, we have to be more descriptive. If you're YC company, or more established - maybe it's enough to say Acme Corp, PHP, email us.

We like to say:

Funded startup looking for a talented Ruby developer to be employee #1 (because that's true, and because there's something unique about being employee #1).