Uptree

Jane Street is a trading firm with a focus on technology and collaborative problem solving. Their trading is based on their own models and on their busiest days, they engage in over a million trades!

With people and offices in New York, London, Hong Kong and Amsterdam, Jane Street is a trading firm that operates around the clock and around the globe, trading a wide range of financial products, including: Equities, Commodities, Options, Bonds and Currencies. Founded in 2000, Jane Street employs over 1000 people.

Technology is at the core of how Jane Street approach trading, and they consider themselves as much a technology company as a trading firm. We use OCaml (a statically typed functional programming language) as their primary development language.