Coding fluency
Implement an LRU cache. Explain your data structures, test capacity one, and walk through an eviction.
What a strong answer demonstrates
Correctness, edge cases, and time / space complexity.
Prepare for Hudson River Trading with a focused mix of coding, design, and communication. Start with your job description and confirm the interview loop with your recruiter.
6 Practice picks
3 Interview reports
5 Levels mapped
01 / MAKE YOUR NEXT SESSION COUNT
Your preparation, made concrete.
System design
Design a notification service. Clarify delivery guarantees, model the data, then handle retries and duplicate events.
What a strong answer demonstrates
Clear requirements, a working baseline, and explicit trade-offs.
Behavioral storytelling
Describe a technical decision you changed after receiving feedback. Explain your contribution and the outcome.
What a strong answer demonstrates
Specific actions, honest reflection, and measurable impact.
BEFORE YOU PRACTICE
Ask your recruiter.
Get the details that a generic company guide cannot know.
- Which team and level is this opening for, and what does success look like?
- What rounds, durations, and evaluation criteria should I prepare for?
- Which languages, tools, and AI assistance are permitted?
- Will design focus on frontend, backend, infrastructure, or another specialty?
- Are there accommodations or preparation materials I should request?
Hudson River Trading practice problems
Company-linked challenges and related lessons from our library. Not a prediction of your interview.
Challenge
Difficulty 6/10
Implement a Binary Search Tree
Challenge
Difficulty 8/10
Course Prerequisites
Challenge
Difficulty 4/10
Max Per Level
Challenge
Difficulty 7/10
Levenshtein Edit Distance
Challenge
Difficulty 4/10
Swap Every Two Nodes in a Linked List
Challenge
Difficulty 6/10
Next Greater Element in a Circular Array
Real interview experiences
3 reports from candidates who interviewed at Hudson River Trading.
What people at Hudson River Trading say
Reviews originally posted on Glassdoor.
An excellent place to do trading. Collaborative teams, very smart coworkers, fun culture.
smart, driven co-workers. tech stack is always improving. benefits are good.
Very transparent and collaborative environment. Partners are coders who work alongside you. Everyone is extremely smart and willing to help and work with you. Every employee has a lot of ownership over their work and can choose to work on what they are interested in. Very good compensation and perks.
Some of the best people I have ever worked work both in terms of talent and personality. Everyone is very passionate about their work. HRT also has some of the most impressive technology and high quality code I have seen. The company is extremely open and collaborative which together encourage a great culture.
I get to spend the majority of my time on real computer science problems. Meetings are rare. Most problems have algorithmic depth in speed, readability and correctness. Many problems are unique to the space and unsolved (or unsolvable without restrictions).