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Advent of FPGA — A Jane Street Challenge

Advent of Code has long been a favorite Decemberritual at Jane Street, with many participating in the month-long puzzle challenge thatencourages thoughtful e...

24 Nov 2025

Jane Street Tech Blog

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Introducing Jane Street's OxCaml Branch!

An overview of Jane Street's OxCaml branch introducing new extensions to OCaml, and how Tarides is supporting the project.

09 Jul 2025

Tarides

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Introducing OxCaml

At Jane Street, we’ve been actively making improvements to OCaml for a long time. Over thelast few years, we’ve started to build some fairly ambitious extens...

14 Jun 2025

Jane Street Tech Blog

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Build Meetup - Jane Street London

Stepping into something different today for a Build Meetup hosted by Tweak, EngFlow and Jane Street at Jane Street’s London offices. I was quite involved with Jbuilder development and early work around Dune 1.0 and some early 2.x work, although it’s not a codebase I get to work on much these days. What was interesting for me, spending a lot of time in GNU make for the compiler, was to get some first-hand “big picture” experience from the talks and also a chance to catch-up with various OCaml people who can be remarkably hard to pin down.

23 May 2025

David Allsopp's Blog

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How we accidentally built a better build system for OCaml

A “build system” is one of the most important tools in a developer’stoolbox. Roughly, it figures out how to create runnable programs froma bunch of different...

24 Jan 2025

Jane Street Tech Blog

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Developer education at Jane Street

Like most places, Jane Street largely teaches developers through a kind of apprenticeshipmodel. A team matching process tries to thoughtfully match new devs ...

01 Oct 2024

Jane Street Tech Blog

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We're sponsoring SoME3

Jane Street is excited to announce our sponsorship ofSoME3, Grant Sanderson and James Schloss’sthird Summer of Math Exposition. SoME is a contest that Grant ...

06 Jul 2023

Jane Street Tech Blog

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