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Haxl is the only team using Haskell in prod, so the team itself isn't all that large. With the traction we gain, though, we could grow.

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Is Bryan O'Sullivan and the team from his Haskell-based startup Facebook acquired in 2011 still there? I sat in on a class of his a while back and remember him ruefully laughing about having to use PHP now.

Bryan is still here. He's actually kicking off a Haskell class within Facebook at the moment - https://twitter.com/bos31337/status/475335956556705792

Great! He's obviously a great advocate for Haskell at Facebook.

I'm confused, Haxl is an open source library, right? So what are you using Haxl for at facebook?

The blog post - https://code.facebook.com/posts/302060973291128/open-sourcin... - describes the initial usage - to assist the Sigma system in answering questions like "Is this content spam?".

Some background on that system, including the FXL component that Haxl replaces, is here: http://research.microsoft.com/en-us/projects/ldg/a10-stein.p...

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