Jobs › Hudson River Trading

Quantitative Latency Engineer

Hudson River Trading · Chicago, IL · Trading Tech

Posted Oct 1, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about latency work you have done professionally. What was the hardest thing to measure accurately?

What they are checking: Whether they have real experience with measurement problems like clock sync and timestamp accuracy.

What would you do

An exchange announces a change to its matching engine. How would you find out what it means for us?

What they are checking: Whether they research exchange architecture and work with exchange contacts to get details.

You found an interesting latency result but the trading team does not trust it. How do you communicate it?

What they are checking: Whether they can explain results clearly and back them with evidence across teams.

About the work

You have a packet capture of our order traffic to an exchange. How would you measure our round-trip latency and its distribution?

What they are checking: Whether they know how to work with timestamped network captures and think in distributions, not averages.

Our fill rate on a hardware strategy dropped this week. How would you investigate why?

What they are checking: Whether they can separate market changes, exchange changes and our own changes using data.

How would you design a controlled experiment to measure the effect of a change to our trading infrastructure?

What they are checking: Whether they understand experiment design, including controls, noise and confounding factors in live markets.

What could cause a rise in cancel-reject responses from an exchange?

What they are checking: Whether they can reason about order timing, race conditions and exchange behavior.

How do you make sure timestamps from different machines can be compared fairly?

What they are checking: Whether they understand clock synchronization methods like PTP and their error bounds.

How would you automate collecting and visualizing exchange communication metrics so others can use them?

What they are checking: Whether they build lasting tools rather than one-off analyses.

How would latency analysis differ between a traditional exchange and a crypto exchange?

What they are checking: Whether they think about differences like network paths, protocols and matching behavior across venues.

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The full job description

As published by Hudson River Trading.

Hudson River Trading (HRT) is seeking curious, thoughtful engineers who enjoy working with data and solving real-world technical problems to join our growing Market Structure Analysis team. In this role as a Quantitative Latency Engineer, you’ll apply data-driven methodologies to understand and optimize trading technology and real-time interactions with financial markets across the globe, spanning traditional and crypto exchanges. No prior finance experience is needed! Responsibilities&nbsp; • Analyze time series network and exchange protocol captures • Become familiar with the details of specific markets, attend presentations and liaise with exchange counterparts • Research exchange features, capabilities, and architecture • Automate collection and visualization of metrics that quantify efficacy of exchange communication • Formulate and conduct controlled experiments that measure impact of calculated changes to HRT’s trading infrastructure • Communicate ideas, requirements, and results across disparate teams • Improve fill rate of our hardware-based trading strategy • Reduce incidence of cancel-reject responses • Investigate and report details of various latency-sensitive exchanges Profile&nbsp; • You possess a degree in Data Analytics or a related field • You can collect and interpret network and/or financial market data • You have professional experience in latency reduction, preferably in finance • You have a basic understanding of proprietary trading and exchange technologies Skills&nbsp; • Proficiency in data analytics including statistics, data visualization, and working with large data sets • Basic understanding of TCP and UDP network protocols • Extensive experience with Python and relevant data libraries (Pandas, Numpy/Scipy) • Some familiarity with the details of modern computer systems and networks • Experience with real time exchange market data and order entry a plus <span data-sheets-value="{"1":2,"2":"Annual base salary range of $________ to $___________. Pay (base and bonus) may vary depending on job-related skills and experience. A sign-on and discretionary performance bonus may be provided as part of the total compensation package, in addition to company-paid medical and/or other benefits."}" data-sheets-userformat="{"2":15105,"3":{"1":0},"11":4,"12":0,"14":{"1":2,"2":0},"15":"Arial","16":12}">The estimated base salary range for this position is 200,000 to 300,000 USD per year (or local equivalent). The base pay offered may vary depending on multiple individualized factors, including location, job-related knowledge, skills, and experience. This role will also be eligible for discretionary performance-based bonuses and a competitive benefits package. Culture <span data-sheets-value="{"1":2,"2":"Hudson River Trading (HRT) brings a scientific approach to trading financial products. We have built one of the world's most sophisticated computing environments for research and development. Our researchers are at the forefront of innovation in the world of algorithmic trading. \n\nAt HRT we come from a variety of disciplines: mathematics and computer science, physics, and engineering, media and tech. We’re a community of self-starters who are motivated by the excitement of being at the cutting edge of automation in every part of our organization - from trading, to business operations, to recruiting and beyond. Our culture celebrates great ideas whether they come from HRT veterans or new hires. At HRT we’re friends and colleagues – whether we are sharing a meal, playing the latest board game, or writing elegant code. We embrace a culture of togetherness that extends far beyond the walls of our office.\n\nFeel like you belong at HRT? Our goal is to find the best people and bring them together to do great work in a place where everyone is valued. HRT is proud of our diverse staff; we have offices all over the globe and benefit from our varied and unique perspectives. HRT is an equal opportunity employer; so whoever you are we’d love to get to know you."}" data-sheets-userformat="{"2":13185,"3":{"1":0},"10":1,"11":4,"12":0,"15":"IBM Plex Sans","16":11}" data-sheets-textstyleruns="{"1":0}{"1":328,"2":{"2":{"1":2,"2":16711935}}}{"1":402}{"1":917,"2":{"2":{"1":2,"2":16711935}}}{"1":945}">Hudson River Trading (HRT) brings a scientific approach to trading financial products. We have built one of the world's most sophisticated computing environments for research and development. Our researchers are at the forefront of innovation in the world of algorithmic trading. At HRT we welcome a variety of expertise: mathematics and computer science, physics and engineering, media and tech. We’re a community of self-starters who are motivated by the excitement of being at the cutting edge of automation in every part of our organization—from trading, to business operations, to recruiting and beyond. We value openness and transparency, and celebrate great ideas from HRT veterans and new hires alike. At HRT we’re friends and colleagues – whether we are sharing a meal, playing the latest board game, or writing elegant code. We embrace a culture of togetherness that extends far beyond the walls of our office. Feel like you belong at HRT? Our goal is to find the best people and bring them together to do great work in a place where everyone is valued. HRT is proud of our diverse staff; we have offices all over the globe and benefit from our varied and unique perspectives. HRT is an equal opportunity employer; so whoever you are we’d love to get to know you. Please be advised: Use of AI tools by an applicant during interviews or assessments is strictly prohibited, unless otherwise instructed or agreed upon. We employ various methods to evaluate the authenticity of candidate responses. If we determine that AI assistance was used by an applicant during an interview or an assessment, we reserve the right to immediately end the interview or assessment, disqualify the applicant’s candidacy and/or rescind any job offers extended. <span data-sheets-value="{"1":2,"2":"Hudson River Trading (HRT) brings a scientific approach to trading financial products. We have built one of the world's most sophisticated computing environments for research and development. Our researchers are at the forefront of innovation in the world of algorithmic trading. \n\nAt HRT we come from a variety of disciplines: mathematics and computer science, physics, and engineering, media and tech. We’re a community of self-starters who are motivated by the excitement of being at the cutting edge of automation in every part of our organization - from trading, to business operations, to recruiting and beyond. Our culture celebrates great ideas whether they come from HRT veterans or new hires. At HRT we’re friends and colleagues – whether we are sharing a meal, playing the latest board game, or writing elegant code. We embrace a culture of togetherness that extends far beyond the walls of our office.\n\nFeel like you belong at HRT? Our goal is to find the best people and bring them together to do great work in a place where everyone is valued. HRT is proud of our diverse staff; we have offices all over the globe and benefit from our varied and unique perspectives. HRT is an equal opportunity employer; so whoever you are we’d love to get to know you."}" data-sheets-userformat="{"2":13185,"3":{"1":0},"10":1,"11":4,"12":0,"15":"IBM Plex Sans","16":11}" data-sheets-textstyleruns="{"1":0}{"1":328,"2":{"2":{"1":2,"2":16711935}}}{"1":402}{"1":917,"2":{"2":{"1":2,"2":16711935}}}{"1":945}">You can review our Global Applicant Privacy Notice , which explains how we process applicant information. &nbsp;

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