Citadel Investment Group Interview Questions

96 total interview insight submissions
Interview Experience (80%)

The Interview Experience is a score from 1 star (very negative) to 5 stars (very positive) generated based on the Interview Insights at this company.

The number you see in the middle of the doughnut pie chart is the simple average of these scores. If you hover over the various sections of the donut, you will see the % breakdown of each score given.

The percentile score in the title is calculated across the entire Company Database and uses an adjusted score based on Bayesian Estimates (to account for companies that have few interview insights). Simply put, as a company gets more reviews, the confidence of a "true score" increases so it is pulled closer to its simple average and away from the average of the entire dataset.

3.4
  • Very Negative
  • Negative
  • Neutral
  • Positive
  • Very Positive
Interview Difficulty (100%)

The Interview Difficulty is a score ranging from very difficult (red) to very easy (green) generated based on the Interview Insights at this company.

The number you see in the middle of the doughnut pie chart is the simple average of these scores. The higher the number, the more difficult the interviews on average. If you hover over the various sections of the doughnut, you will see the % breakdown of each score given.

The percentile score in the title is calculated across the entire Company Database and uses an adjusted score based on Bayesian Estimates (to account for companies that have few interview insights). Simply put, as a company gets more insights, the confidence of a "true score" increases so it is pulled closer to its simple average and away from the average of the entire data set.

3.5
  • Very Easy
  • Easy
  • Average
  • Difficult
  • Very Difficult
% Interns - FT Offers (85%)

The % of Interns Getting a Full Time Offer chart is meant to provide a realistic estimate of the hiring practices of the company based on the reviews at this company.

The number you see in the middle of the doughnut pie chart is the simple average of these scores. If you hover over the various sections of the doughnut, you will see the % breakdown of each score given.

The percentile score in the title is calculated across the entire Company Database and uses an adjusted score based on Bayesian Estimates (to account for companies that have few reviews). Simply put, as a company gets more reviews, the confidence of a "true score" increases so it is pulled closer to the simple company average and away from the average of the entire data set.

53%
  • 0%
  • 10%
  • 20%
  • 30%
  • 40%
  • 50%
  • 60%
  • 70%
  • 80%
  • 90%
  • 100%

About interviews at Citadel Investment Group

Interviews at Citadel Investment Group

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Year
Job Title
Group/Division
Location
Experience
Difficulty
Year 2013
Job Title
Group/Division
Location New York
Experience
Neutral
Difficulty
Easy
1st Year Analyst
Year 2012
Job Title 1st Year Analyst
Group/Division
Location Chicago
Experience
Positive
Difficulty
Average
Developer
Year 2011
Job Title Developer
Group/Division
Location Chicago
Experience
Positive
Difficulty
Difficult
1st Year Analyst
Year 2011
Job Title 1st Year Analyst
Group/Division
Location Chicago
Experience
Neutral
Difficulty
Average
Intern
Year 2012
Job Title Intern
Group/Division
Location New York
Experience
Positive
Difficulty
Average
1st Year Analyst
Year 2011
Job Title 1st Year Analyst
Group/Division
Location Chicago
Experience
Neutral
Difficulty
Average

Interview Questions & Answers - Citadel Investment Group Examples

Software Engineer Interview - Technology, Media and Telecom (TMT)

Anonymous interview candidate in Garfield
Interviewed: March 2026
Outcome
No Offer
Interview Source
Staffing Agency
Length of Process
Less than 1 month
Application
Phone Interview
1 on 1 Interview
Interview
1st round (passed) - Phone interview with hiring manager.
2nd round (failed) - Technical interview with Senior Engineer
Interview Questions
LeetCode style medium and hard question.
Arrays indexing and sorting question.

Quantitative Researcher Interview - Equity Capital Markets

Anonymous interview candidate in New York
Interviewed: March 2026
Outcome
No Offer
Interview Source
Recruiter
Length of Process
1-2 months
Application
Phone Interview
1 on 1 Interview
Interview
2 rounds online with Senior Researcher and Head of Research. Mostly Probability and regression stats as well as background. Then a superday of time series, coding, and more resume grilling
Interview Questions
Knowing ins and outs of time series modeling

Sector Data Analyst Intern Interview - Investments

Anonymous interview candidate in London
Interviewed: March 2026
Outcome
No Offer
Interview Source
College / University / On Campus Recruiting
Length of Process
1-2 months
Application
Phone Interview
1 on 1 Interview
Interview
Recruiter reached out to me initially after on-campus recruiting session (London). Then, had an OA on a Zoom call which consisted of Python/SQL questions (think Pandas, databases, advanced python concepts like decorators). Followed up with a 30 minute HR interview where I had to pitch a stock to a HR lady and defend my assumptions. Then had a 45 minute first round "technical" interview where they asked me brain teasers. Failed this round because I thought it was going to be more SQL and not brain teasers so didn't prep at all on brain teasers.
Interview Questions
1. Is the number X prime? (Had to answer within 10 seconds)
2. Brain teasers on on/off logic type question

Quantitative Research Analyst Interview - Hedge Fund

Anonymous interview candidate in London
Interviewed: July 2025
Outcome
Declined Offer
Interview Source
College / University / On Campus Recruiting
Length of Process
3-4 months
Application
Phone Interview
1 on 1 Interview
Skills Test
Interview
The interview process was quite long in general. There was the total of 5 technical interviews + HR calls. After the first screening interview round that was held with a junior researcher, I was called to join the 2 rounds with more senior researchers. After that there were 2 rounds with the sernior researchers that were mostly about the motivation to work in the company and detailed talks about the previous experience. The interviews were not super hard, I would say mostly usual brainteasers + general knowledge of mathematical analysis and optimization for the maths part; leetcode questions and general knowledge of programmming paradigms for the coding part.

All technical interviewers were super nice and helpful but I did not like the HR round at all. In terms of motivation, I got the feeling that they are looking for high ego individuals who are ready to constantly scream and shout why they are the best and things like that.
Interview Questions
All the questions were quite easy to be honest, they do not require any special preparations. I guess everyone who was doing well in uni at maths and CS should have no difficulty solving those questions.

Probably the hardest one was something like : they will give you some strange number (large factorial), and will ask you to approximate the number of zeros in this number. It is not necessarily difficult, but rather something that you are not practicing every day and can spend some time trying to remember the approach.

Software Engineer Interview - Quantitative Research

Anonymous interview candidate in New York
Interviewed: August 2025
Outcome
No Offer
Interview Source
Recruiter
Length of Process
1-2 months
Application
Phone Interview
1 on 1 Interview
Interview
Call with recruiter
Call with HR - discussed role scope, my background, where I’d fit in. No technical questions, 20 mins super easy and casual

Super day (2 1 hour interviews)
10 mins introductions in each then coding questions.
Standard leetcode medium - hard / system design intertwined.
Lots of discussion on expanding the system / how to handle different edge cases. Was cut here
Interview Questions
Design a cache that references values from other keys. How would you invalidate values? What are the trade offs between proactively invalidating cache values vs evaluating if they are valid at retrieval time?

sector data analyst Interview - Sales and Trading

Anonymous interview candidate in E1 7HX
Interviewed: November 2025
Outcome
No Offer
Interview Source
Applied Online
Length of Process
Less than 1 month
Application
1 on 1 Interview
Interview
first round was an online coding assessment on hackerrank (sql and python) which was pretty easy, then i got invited to interview with the head of recruiting, the interview was a mix of both fit and technical question, with the classic why citadel, why this position, tell me about you, pitch me a stock then she moved on the use of alternative data asking me about any type of data i could use to generate investment ideas, how would i use it, how can i detect noise.
Interview Questions
How to detect noise in alternative dataset ?

Quantitative Developer Interview - Technology

Anonymous interview candidate in New York
Interviewed: June 2024
Outcome
No Offer
Interview Source
Recruiter
Length of Process
Less than 1 month
Application
Phone Interview
1 on 1 Interview
Interview
I was recruited to apply for Citadel NXT. I had a phone screen which consisted of a basic leetcode question (graph based) and then a virtual onsite in which I bombed the leetcode question (hard data structure). My best advice is to focus on the leetcode questions in the bank and make sure you thoroughly understand most of the hard ones.
Interview Questions
Essentially it was a Least Frequently Used Cache question

Associate Interview - Generalist

Anonymous interview candidate in New York
Interviewed: April 2009
Outcome
Declined Offer
Interview Source
Employee Referral
Length of Process
1-2 months
Application
Interview
Jane presented herself very well during the interview. She arrived on time, was well-prepared, and demonstrated a strong understanding of our company’s mission and values. Her communication style was clear and confident, and she gave thoughtful, structured responses to each question.

She spoke in detail about her past experience managing cross-functional projects, which aligned closely with the requirements of the role. In particular, her example of coordinating a team through a product launch showed strong organizational skills and adaptability under pressure.

While her technical knowledge was solid, there may be a need for some additional training in our specific tools and platforms. That said, she showed genuine enthusiasm about learning and quickly adapting to new systems.
Interview Questions
It caught me off guard because I hadn’t prepared for that exact scenario, but I walked through an example from a previous role where I had to rely on judgment and quick research to move a project forward.

Associate Interview - Consumer - Retail

Anonymous interview candidate in London
Interviewed: May 2024
Outcome
No Offer
Interview Source
Recruiter
Length of Process
Less than 1 month
Application
1 on 1 Interview
Skills Test
IQ / Intelligence Test
Interview
After headhunter was sent assessment + modeling test, 1-2 weeks later scheduled BD interview which was supposed to be stock pitches but moved to paper valuation of hypothetical company (what assumptions, how get to those assumptions, go through all P&L/CF lines)
Interview Questions
Paper Valuation (as stated)

Quant Developer Interview - Trading

Anonymous interview candidate in Greenwich
Interviewed: October 2024
Outcome
No Offer
Interview Source
Staffing Agency
Length of Process
2-3 months
Application
1 on 1 Interview
Interview
Contacted by a staffing company regarding a software / quant developer role. First did an online coding test. Passed it and scheduled first round of interview, which asked about my resume. Then, scheduled a round of coding interview. After that, scheduled another round of coding interview. After that, had a in-house recruiter call which confirmed my interests and scheduled a HM/leadership call. There were an on-site full loop with the team after the HM call and another executive call after the full loop. Didn't make it to the last.
Interview Questions
Cannot disclose the question, but the leadership calls were difficult. They dug deeply on your motivation of joining their team, and talked about deep domain knowledge to test your experience. If you have a different background then you would not be able to make it.
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