According to what I read, they only use the database as a place to store data.  They "upload" it to some cache using code totally devoid of any joins and then they let the code have its way with the data that's been cached.  I can see why they need  hundreds of servers to do such a thing.

As for their Developers... who knows?  Maybe they have all the Developers in the world that actually know how to get the current date and time and that's why I can't find anyone. 😉