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Jane Street Tech Blog
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Latest posts
Last updated about 1 month ago
What the interns have wrought, 2025 edition
about 1 month ago
Yet again, we’re at the end of our internship season, and so...
A Higgs-bugson in the Linux Kernel
3 months ago
We recently ran across a strange higgs-bugson that manifested itself in a...
Introducing OxCaml
4 months ago
At Jane Street, we’ve been actively making improvements to OCaml for a...
Advent of Hardcaml
7 months ago
Advent of Code is an annual Advent calendar featuring small programming puzzles...
How we accidentally built a better build system for OCaml
9 months ago
A “build system” is one of the most important tools in a...
Developer education at Jane Street
9 days ago
Like most places, Jane Street largely teaches developers through a kind of...
What the interns have wrought, 2024 edition
about 1 year ago
We’re once again at the end of our internship season, and it’s...
Visualizing piecewise linear neural networks
about 1 year ago
Neural networks are often thought of as opaque, black-box function approximators, but...
Building reproducible Python environments with XARs
over 2 years ago
Our traders and researchers love Python for its agility and for its...
What if writing tests was a joyful experience?
almost 3 years ago
At Jane Street we use a pattern/library called “expect tests” that makes...
Accelerating zk-SNARKs - MSM and NTT algorithms on FPGAs with Hardcaml
almost 3 years ago
In 2022 a consortium of companies ran an international competition called the...