[carlosnunez]

I LOVE F#. I wish I could use it more often. I haven't used it since I worked at Jane Street three years ago, and Jet.com is the only other place that's using it seriously at the moment.

It is such an expressive and clear language to write code in. That is until you start needing to use imperative .NET types :)

[chadzawistowski]

I thought Jane Street used OCaml! (I know the two are similar.) Why did they need to target the CLR?

[thristian]

Just a guess: even if your back-end is all OCaml, traders still want to get data into Excel to play with it.

[carlosnunez]

Yes, Jane Street uses OCaml for their trading systems but we also use(d?) F# for some (very important) odds and ends.

[jackfoxy]

F# is our primary language at Tachyus.