Jane Street

If you haven't heard of us before, we’re a quantitative trading firm that cares a lot about technology. This means building elegant solutions that scale well, never assuming that “best in market” is the same as “best possible,” and ensuring everybody has the resources needed to do their jobs well. We're looking for engineers in New York, London, Hong Kong, and Singapore including, but not limited to: - Meticulous and experienced Windows Engineers to help run our entire Windows infrastructure, from managing Active Directory and DNS, to acting as an escalation point for more complex issues in the Windows Desktop environment - Linux Engineers to join a group of Systems Engineers, Administrators and Programmers, tasked with maintaining and improving the linux platform that powers Jane Street's production trading systems - Software Engineers who are intimately tied into every area of our business. We are big believers in functional programming, using OCaml, a statically-typed functional programming language, as our primary development language. We also believe in the value of open source software, using it in our daily work and releasing hundreds of thousands of lines of our own code as open source