Hudson River Trading

Algorithm Developer Interview Experience - New York, New York

September 1, 2015

Neutral ExperienceNo Offer

Process

I applied online and was contacted for a phone interview with a developer within two weeks. I stumbled through the math on one of the brainteasers, and the interviewer seemed disappointed at how long I was taking. They asked a mix of brainteasers, math, and computer science questions. About half the interview was going over my resume, and the other half was questions.

Questions

If I have a jar with 1000 coins, and one is double-headed, and I pick one coin randomly and flip 10 heads, what is the probability it is the double-headed coin?

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Interview Statistics

The following metrics were computed from 19 interview experiences for the Hudson River Trading Algorithm Developer role in New York, New York.

Success Rate

11%

Pass Rate

Hudson River Trading's interview process for their Algorithm Developer roles in New York, New York is extremely selective, failing the vast majority of engineers.

Experience Rating

Positive47%

Neutral47%

Negative5%

Candidates reported having very good feelings for Hudson River Trading's Algorithm Developer interview process in New York, New York.

Hudson River Trading Work Experiences

Good, but more politics

Algorithm Developer • Former Employee

New York, New York, United States

October 6, 2025

Pros: - Good pay - Smart and motivated coworkers

Cons: - increasingly political - managerial favoritism

Good, but more politics

Algorithm Developer • Former Employee

New York, New York, United States

October 6, 2025

Pros: - Good pay - Smart and motivated coworkers

Cons: - increasingly political - managerial favoritism

Top tier in many aspects

Algorithm Developer • Current Employee

New York, New York, United States

February 9, 2024

Pros: Great infra making your time worth much more than average. Iteration happens fast and in meaningful directions. One of the smartest crowds I’ve worked with. Conversations are loaded with info and folks are willing to share. Competitive comp and minimal toxicity. Competitive benefits and improving; they have 401k match now.

Cons: Not really a con, but people tend to be top-performers, which is something to keep up with.

Top tier in many aspects

Algorithm Developer • Current Employee

New York, New York, United States

February 9, 2024

Pros: Great infra making your time worth much more than average. Iteration happens fast and in meaningful directions. One of the smartest crowds I’ve worked with. Conversations are loaded with info and folks are willing to share. Competitive comp and minimal toxicity. Competitive benefits and improving; they have 401k match now.

Cons: Not really a con, but people tend to be top-performers, which is something to keep up with.

Exciting, challenging, fun place to work

Algorithm Developer • Current Employee

New York, New York, United States

Pros: They treat their interns well while giving them challenging projects, interesting talks, and competitive compensation.

Exciting, challenging, fun place to work

Algorithm Developer • Current Employee

New York, New York, United States

Pros: They treat their interns well while giving them challenging projects, interesting talks, and competitive compensation.

Good, but more politics

Algorithm Developer • Former Employee

New York, New York, United States

October 6, 2025

Pros: - Good pay - Smart and motivated coworkers

Cons: - increasingly political - managerial favoritism

4.0
Good, but more politics
Algorithm Developer • Former Employee
New York, New York, United States
October 6, 2025
Pros: - Good pay - Smart and motivated coworkers
Cons: - increasingly political - managerial favoritism

Top tier in many aspects

Algorithm Developer • Current Employee

New York, New York, United States

February 9, 2024

Pros: Great infra making your time worth much more than average. Iteration happens fast and in meaningful directions. One of the smartest crowds I’ve worked with. Conversations are loaded with info and folks are willing to share. Competitive comp and minimal toxicity. Competitive benefits and improving; they have 401k match now.

Cons: Not really a con, but people tend to be top-performers, which is something to keep up with.

5.0
Top tier in many aspects
Algorithm Developer • Current Employee
New York, New York, United States
February 9, 2024
Pros: Great infra making your time worth much more than average. Iteration happens fast and in meaningful directions. One of the smartest crowds I’ve worked with. Conversations are loaded with info and folks are willing to share. Competitive comp and minimal toxicity. Competitive benefits and improving; they have 401k match now.
Cons: Not really a con, but people tend to be top-performers, which is something to keep up with.

Exciting, challenging, fun place to work

Algorithm Developer • Current Employee

New York, New York, United States

Pros: They treat their interns well while giving them challenging projects, interesting talks, and competitive compensation.

5.0
Exciting, challenging, fun place to work
Algorithm Developer • Current Employee
New York, New York, United States
July 19, 2021
Pros: They treat their interns well while giving them challenging projects, interesting talks, and competitive compensation.
Cons: None

Hudson River Trading Interview Questions

Add Edges to Make Degrees of All Nodes Even

You're given a graph; your goal is to add edges to it so that every node has an even degree. Find the minimum number of edges to add to achieve this.

Convert Integer to the Sum of Two No-Zero Integers

Given an integer, you need to express it as the sum of two positive integers, neither of which contains the digit zero. Find and return any such pair of no-zero integers.

ArraysGreedy Algorithms

Detect Pattern of Length M Repeated K or More Times

Determine if a pattern of a certain length repeats itself consecutively in an array at least a given number of times. Specifically, check for repeating subarrays.

ArraysTwo PointersSliding Windows

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