I run and founded the data science team at Zalora, a Singaporean online retail company operating across South East Asia. I discovered Haskell last year as my first functional language. We use it extensively, although I am currently spending a lot more time learning about the language than writing anything in it thanks to the brilliant people who do the writing!
I'm particularly interested in using Haskell for machine learning, with applications (at Zalora) ranging from recommendation engines to predicting the performance of products before they are launched using machine vision. If you are working on related libraries, please let me know.