Hudson River Trading

@jay_drainjr @domcooke @colossusmag applications for summer 2027 open in the fall, just saying 👀

HRT’s 2015 winter internship might be the greatest intern class of all time. 4 of the 10 have gone on to build companies worth over $80B combined Jeff Yan, Hyperliquid ($40B FDV) Alexandr Wang, Scale AI ($29B) Scott Wu, Cognition ($10.2B) Jesse Zhang, Decagon ($4.5B)

Deep inside a Norwegian mountain lies one of the most unusual HPC environments in the world: @LefdalMineDC, where cold seawater siphoned from a nearby fjord cools dense GPU clusters designed for large-scale AI workloads. HRT’s deployment at Lefdal includes DLC racks operating above 125 kW per cabinet, integrated with high-speed interconnects and bespoke storage systems designed to power our cutting-edge quantitative research. In our latest video, we take a look inside the mine at our next-gen HPC and networking infrastructure: youtu.be/kWPl7Awtq5U

AI compute keeps scaling, but networking hasn’t kept pace. Large models increasingly depend on moving huge volumes of data across thousands of GPUs, and the “network wall” is becoming a real systems constraint. We’re excited to be a co-lead investor in @EriduAi's Series A as they rethink AI networking from the ground up.

2028 grads: join us for Inside HRT! Through this program, we aim to provide essential learning that removes barriers and creates opportunities for promising STEM students who haven't yet had exposure to the quant finance industry. You'll spend three days at our NYC HQ diving into tech talks, panels, and hands-on workshops. 📅 May 18–20, 2026 📍 NYC Apply by March 26, 2026: hudsonrivertrading.com/hrt-job/inside…

We just open-sourced ‘slang-server’, a SystemVerilog language server that we built for intelligent code navigation and linting across hardware codebases. Our latest blog post breaks down how we work with open source at HRT, and more broadly invest in developer efficiency. It also includes technical breakdowns of how we used the Slang library to build the language server, and how a series of targeted optimizations led to sub-second indexing across thousands of files. Check it out on the HRT Beat: hudsonrivertrading.com/hrtbeat/design…

Lunar New Year in NYC 🧧 We welcomed the Year of the Horse with a traditional lion dance performance and a celebratory dinner. Wishing everyone a year of health, momentum, and inspiration. 🐎

Explore HRT is going global! 🎉 We’re inviting standout 2028 grads in math, CS, and other STEM-related fields to spend three days getting a closer look at how we work and learn together at HRT. 📍 London · April 7–9 📍 NYC · April 29–May 1 📍 Singapore · May 13–15 Singapore applications open Feb 23. Please select only one location when applying, and choose the office where you’d be interested in future internship or full-time opportunities. hudsonrivertrading.com/careers/?searc…

@__paleologo our favorite part of the day! 🍔📈

A minor lesson I learned. Hudson River Trading has large cafeterias in all of its centers. And an abnormal amount of communal spaces (alcoves, booths, meeting room). You sit for lunch and talk to strangers or old friends. I estimate that premier real estate space (and the chef-served lunches) to cost $20-30m/yr. It is a 100x return/yr. Eating together is how you get people to lower their defenses, talk, trust others, collaborate, create alliances since the Pleistocene. And the lesson is that you can win at technology by going back to very simplest, ancestral things.

What a team, what a year! We wrapped it up the best way we know how: together. Happy holidays from all of us at HRT. We'll see you in 2026! 👋

🌟 Shout-out to our amazing sponsors for supporting The 2025 ICPC Asia Hong Kong Regional Contest! @jetbrains – ICPC Global Programming Tools Sponsor @JaneStreetGroup – ICPC Titanium Multi-Regional Sponsor @weHRTyou – ICPC Silver Sponsor #ICPCNews #ICPCAsiaEast #ThankYou🌐💻

HRTWorker isn’t what we call ourselves (see: HRTer); it’s the SharedWorker framework we built to power our Ops GUIs when a dozen tabs all want the same trading data. Read how we make our GUIs efficient by sharing a single underlying data stream, here: brnw.ch/21wXMiv

As @iaindunning noted on the podcast. Training trading models increasingly resembles trading other AI training. So if you want to get out of Big Slop and do something that benefits humanity (providing liquidity, more accurate securities pricing), you should work with him

Applying AI to the world of trading is messy, complex, and unbelievably cool. We loved getting to talk about it. Catch @iaindunning on Odd Lots to hear what makes this problem space uniquely challenging—and rewarding—from real-time inference at co-located exchanges to the limits of interpretability in low-latency trading systems. open.spotify.com/episode/3Q1mql…

HeraclesQL is HRT’s open-source Python DSL for writing type-safe, expressive alerts on VictoriaMetrics. It's Python-native, brings Meta-alerts that catch footguns before prod does, and utilizes tooling like Delos & Hermes. Catch the full deep dive: 🔗 brnw.ch/21wX05Z

From quant research to software engineering, we’ve just opened up a new batch of internships and new grad roles in our London office for Summer 2026 and beyond. Explore all student opportunities: brnw.ch/21wWIlG 📸 HRT London's private terrace

Congrats @dwarkesh_sp on publishing your new book. Thanks for the copy, we're loving it!

How is engineering at HRT organized? What can candidates expect from the interview? After 13 years building our infra, scaling teams, and shaping our hiring process, Joe Smith answers questions he hears most from candidates and curious engineers alike. hudsonrivertrading.com/hrtbeat/engine…

We invited @dwarkesh_sp to tackle a foundational question in quant trading: What does it take to build a predictive signal from market data? We loved showing him what makes work at HRT so fun — and why, in Marc’s words, “it occupies a lot of very smart people for years.”

This January, we’re excited to welcome PhD students interested in exploring quantitative research. If you’re a 2026 – 2028 PhD candidate from a quantitative or technical discipline, we'd love to hear from you. Apply by November 14: hudsonrivertrading.com/hrt-job/phd-wi…

Connect with us at #CppCon2025! Catch HRTer Robert Leahy’s talk on September 18, stop by our table, or join us for our Networking Social. Check out all the details here: cppcon.org/hudson-river-t… See you there!