Quant developer mock interviews
Five rounds in C++ and on your feet: performance-minded coding, a C++ deep dive, probability against the clock, and the design of a low-latency trading system.
- Coding, C++ deep dive, probability, low-latency design, behavioral
- C++
- Five problems in 30 min
The rounds
Coding (performance)
Data structures and algorithms with a performance and memory focus.
45 min
C++ deep dive
Memory model, templates, undefined behavior, cache and concurrency.
35 min
Probability & mental math
Brainteasers, expected value, estimation and market-making style games.
30 min
Low-latency system design
Design a matching engine, feed handler or low-latency pipeline.
45 to 50 min
Behavioral
Stories about pressure, precision, ownership and learning.
30 to 35 min
A full loop for one role adds a recruiter screen (12 to 15 min) and a hiring manager conversation (25 to 30 min).
Regular and lead level
- Regular
- Correct answers with structured reasoning, quickly, and code that is correct and aware of memory and performance.
- Lead
- Also market intuition: connecting probability results to pricing, risk and decisions, and owning the design trade-offs.
See the feedback before you start
Full reports from the real report pipeline, for a fictional student and a scripted interview.
Questions
What is the probability round like?
Five short problems in 30 min: brainteasers, expected value, estimation and market-making style games. Reason out loud; once you answer, Vera asks you to sanity-check it or extends the problem once.
What does the C++ deep dive cover?
The memory model, templates, undefined behavior, cache and concurrency, asked one question at a time with probes for depth.
What do I design in the system design round?
A matching engine, a feed handler or a low-latency pipeline, with the latency, failure and trade-off questions that come with it.