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Fun with Algebraic Effects - from Toy Examples to Hardcaml Simulations

I recently ported the Hardcaml_step_testbenchlibrary, one of the libraries thatwe use at Jane Street for Hardcaml simulations, from using monads to using alg...

06 Jan 2026

Jane Street Tech Blog

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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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Advent of Hardcaml

Advent of Code is an annual Advent calendarfeaturing small programming puzzles created by Eric Wastl, which has been runningevery December since 2015. Being ...

22 Mar 2025

Jane Street Tech Blog

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Accelerating zk-SNARKs - MSM and NTT algorithms on FPGAs with Hardcaml

In 2022 a consortium of companies ran an international competition,called the ZPrize, to advance the state ofthe art in “zero-knowledge” cryptography. We dec...

07 Dec 2022

Jane Street Tech Blog

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Using ASCII waveforms to test hardware designs

At Jane Street, an “expecttest” is atest where you don’t manually write the output you’d like to checkyour code against – instead, this output is captured au...

01 Jun 2020

Jane Street Tech Blog

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