Just a nitpick, but it's OCaml for Jane Street rather than Haskell. Haskell is certainly used as a bit of a secret weapon in some of the Quant groups at banks

Just a nitpick, but it's OCaml for Jane Street rather than Haskell. Haskell is certainly used as a bit of a secret weapon in some of the Quant groups at banks like Barclays Capital though!