[scarmig]

Quora to the rescue:

http://www.quora.com/Twitter-Inc-company/Why-does-Twitter-ne...

[ck2]

Wow, very nice find. I took a stab at the question via Google but gave up.

I also discovered they have their own (but singular) datacenter:

http://engineering.twitter.com/2010/07/room-to-grow-twitter-...

But they are planning on adding more, which leads me to believe maybe that's what some of the new hires are for.

[wh-uws]

Wow, very nice find. I took a stab at the question via Google but gave up.

Exactly why quora is compelling. If you didn't know now you do

[js2]

If you ever wonder about why a company needs X developers, please come back to this list.

[BenSchaechter]

Huzzah, I asked this question!