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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 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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Expanding Dune Package Management to the Rest of the Ecosystem

Explanation of our learnings from attempting to build all Dune packages in opam-repository using Dune package management.

11 Apr 2025

Tarides

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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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Eio From a User's Perspective: An Interview With Simon Grondin

Are you curious about Eio but not sure what to expect? Eio is an effects-based direct-style concurrency library for OCaml 5. I recently…

19 Sep 2024

Tarides

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ICFP 2024

It’s no secret that Jane Street is an active participant in the programming languagecommunity, and we’re excited to be attending ICFP 2024, theInternational ...

29 Aug 2024

Jane Street Tech Blog

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Eio 1.0 Release: Introducing a new Effects-Based I/O Library for OCaml

The OCaml 5 update brought much-anticipated support for programming on multiple cores. It also introduced support for concurrency via effect…

20 Mar 2024

Tarides

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