The IMC Trading Onsite Coding + Systems interview is stage 6 of 7 in the IMC Trading interview process, after the Technical Round. Format: 2-hr sessions · live coding + systems deep-dive. The engineering onsite: live coding (often 2-hour sessions) plus a deep systems/OS round: CPU, TLB, segfaults, signals & signal masks, C++ internals, Linux debugging, REST/asyncio.
Preparing for this round? Practice the 15 questions mapped to the IMC Trading Onsite Coding + Systems, with worked solutions. A free account saves your progress.
What the Onsite Coding + Systems tests
Chicago/Amsterdam systems-engineer onsites can simulate a server-outage triage with many candidates. The Python-developer variant swaps in a 3-5 hr take-home with a README and library-choice justification.
QuantVault maps 15 practice problems to this round. By topic, the biggest groups are coding (14), optimization (1); by difficulty, 1 easy, 8 medium and 6 hard. 10 of them were reported by candidates who interviewed at IMC Trading, most recently in Sep 2025.
Who takes this round: Software Engineer candidates. See the full IMC Trading process and who takes each round.
How to prepare for the Onsite Coding + Systems
- Systems depth is non-negotiable. Have a 30-second story for cache/TLB, signals & masks, contention, and how you'd debug a Linux production issue.
- For the take-home: justify your library choices and write a clear README — they grade engineering judgment, not just a passing script.
Further reading: How quant superdays work · Behavioral questions at trading firms · C++ and low-latency interview questions · Market-making game interview guide.
Question types in this round
The 2 largest question types in the IMC Trading Onsite Coding + Systems practice set; across them the most common sub-topics are data structures, graph algorithms, complexity analysis, sorting and searching, divide and conquer, dynamic programming. The questions themselves, with worked solutions, are in the round practice.
Coding14 in this round
Optimization1 in this round
Common mistakes
- Cleanliness + complexity. Get a correct solution fast, then drive the optimization conversation (the OA-style TLE traps recur live).
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Frequently asked questions
What is the IMC Trading Onsite Coding + Systems interview?
It is stage 6 of 7 in the IMC Trading interview process, after the Technical Round. Format: 2-hr sessions · live coding + systems deep-dive. The engineering onsite: live coding (often 2-hour sessions) plus a deep systems/OS round: CPU, TLB, segfaults, signals & signal masks, C++ internals, Linux debugging, REST/asyncio. Chicago/Amsterdam systems-engineer onsites can simulate a server-outage triage with many candidates.
What questions come up in the IMC Trading Onsite Coding + Systems interview?
The practice set QuantVault maps to this round centers on coding, optimization.
How should I prepare for the IMC Trading Onsite Coding + Systems interview?
Systems depth is non-negotiable. Have a 30-second story for cache/TLB, signals & masks, contention, and how you'd debug a Linux production issue. For the take-home: justify your library choices and write a clear README — they grade engineering judgment, not just a passing script.
What comes after the Onsite Coding + Systems?
The Superday / Virtual Onsite (stage 7 of 7). Format: Onsite or virtual · ~5 rounds across the day.
Practice the IMC Trading Onsite Coding + Systems round
Work the 15 mapped practice problems with progress tracking, then move to the next stage of the IMC Trading funnel.