This article was written about the same time when I interviewed with this group. I was very enthusiastic about Haskell but a senior Haskell lead told me I needed much more Haskell experience but I was otherwise an interesting candidate and he offered to put me in touch with the other FB team doing a similar function, but in Java. I was only interested in learning Haskell, so nothing happened. Still it was very cool to be able to talk with a couple of famous Haskell folks.