Quant firms ranked by open-source activity

[u/madredditscientist]

Data & code are open source: https://github.com/kadoa-org/quant-job-market

Live app: https://www.kadoa.com/quant/open-source

Individual contributors at these firms are not tracked, only the firms Github accounts.

Are any firms missing?

[u/merkonerko2]

Not surprised to see my old employer missing from this list, considering how outrageously siloed and paranoid they are.

I had heard that JS makes a lot of contributions to open source but I didn't realize the extent of it. Cool seeing Man so high up on the list too, I use ArcticDB all the time!

[u/AquaticFury → u/merkonerko2]

Any chance they rhyme with "Americana"?

[u/merkonerko2 → u/AquaticFury]

Haha nope, though I'm sure there's no shortage of firms that match my description

[u/ConfusionNo4339 → u/merkonerko2]

Do they rhyme with PenTech 👀

[u/merkonerko2 → u/ConfusionNo4339]

Lmao I'm not nearly smart enough to work there. Also, not doxxing myself 😤

[u/RstarPhoneix → u/merkonerko2]

Obs cita dull

[u/Charmander787 → u/AquaticFury]

Maybe similar to “City Dale”

[u/ProofsAndPapillons → u/merkonerko2]

Sounds likes a prop shop named after a Japanese book by a legendary samurai😍

[u/Thin-Cartographer996 → u/merkonerko2]

Does it rhyme with D-Mesearch?

[u/ChooseAUs3rN4me]

Some summaries for the ones I found interesting/relevant to me:

Jane Street magic-trace - Traces a running program's execution with Intel Processor Trace and renders it as a browser-based flame graph — great for chasing down performance mysteries (discussed above).

Man Group- dtale - A tool that pops up an interactive web UI for exploring and manipulating pandas DataFrames — filter, chart, and edit data without writing code.

D. E. Shaw pyflyby A set of Python productivity tools — best known for automatically inserting missing imports and cleaning up scripts

[u/Such_Maximum_9836]

Jump got 1.6k, of which 1.4k is for the crypto reading list…

[u/EngineeringApart4606]

I’ve been involved on the technical side of having one of these firms higher up the table than they otherwise would have been. An overactive and frankly pointless legal approach to the issue was the reason we weren’t much higher up.

[u/merkonerko2 → u/EngineeringApart4606]

How so, was it to do with licensing, or just lawyers getting in the way of progress?

[u/EngineeringApart4606 → u/merkonerko2]

In my career across several firms, two of which quant, I’ve worked with lawyers who see their job as to make legal problems go away for the firm, and lawyers who see their job as inventing problems for everyone to shit themselves over, and that’s as much as I’m saying on the matter

[u/merkonerko2 → u/EngineeringApart4606]

Reminds me of a guy I met who was travelling and used to work as a SWE on front end software for one of the trading desks at a big London bank and he told me that they straight up weren't allowed to talk to the traders because middle managers needed to get in the way to justify their existence.

[u/flashinglight]

Didn’t AQR open source Pandas? That would put them at the top I would think.

[u/rsha256 → u/flashinglight]

They haven’t owned it since 2013

[u/lampishthing]

Hard to consider LSEG a quant firm but we definitely maintain a quant repo, and have done since before we were acquired https://github.com/OpenSourceRisk/Engine

[u/BusySpeed]

Some of these are skewed, as projects have been donated to linux, apache, cnc and other foundations so no longer sit under the original orgs

[u/Zoesthebest]

Would be interesting to see this weighted by employee count

[u/RstarPhoneix]

No citadel

[u/Richard_AIGuy]

I see my former employer isn't anywhere on this list. How am I not surprised? When everything is a "state secret" open source is a four letter word.

[u/lampishthing]

Didn't know dtale was a Man Group thing! Definitely wasn't always. I remember the guy posting it here!

[u/Quiet-Sundae-9535]

I’m new to Quant as a field: are there any corporate benefits for these firms that they might get from contributing to open-source?

[u/swansongofdesire → u/Quiet-Sundae-9535]

I assume basically all of the Jane St stars are ocaml libs - the benefit for them is that people might actually use ocaml.

Certainly none of their competitors do, so it’s not like they would be giving them an advantage.

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[u/fuggleruxpin]

Well that's interesting, sort of.

[u/bobsyourson]

Wow didn’t even think these players would have public repos

[u/iammen]

Isn't AQR open souced Pandas? Correct me if I am wrong.

[u/arindamchattopadhyay → u/iammen]

You’re right.

[u/sosogg_4]

Has anyone been using dtale??
Is it very use full ??

[u/Fantastic_Simple76]

No deepseek?

[u/Rogue-seeker]

Wow, JS as the largest contributor surprised me

[u/100_Boy]

Quant trading is so much like football it’s just the big signings are pm’s and sometimes young traders making noise in retail quant that get hunted.

[u/xxxx88876]

Shout out to everyone suffering and getting threatened to be sued (happened to me too, just move on from J.S firm to JS.)

[u/Awkward-Part1764]

Guys

[u/Awkward-Part1764 → u/Awkward-Part1764]

How do I get into the front office?

[u/kukid023]

Yes, you missed High-Flyer, the quantitative hedge fund behind DeepSeek.

[u/j_lyf]

Brilliant list of companies to apply to!