Jump Trading runs one of the most technically demanding and famously secretive processes in proprietary trading. Founded in 1999 by former CME pit traders Bill DiSomma and Paul Gurinas, who met in the Deutsche Mark pit at the Chicago Mercantile Exchange, it has grown into a global high-frequency firm with over 1,600 employees across Chicago, New York, Amsterdam, London and Singapore, trading futures, options, equities and crypto. It is known for its obsession with speed, its low-latency infrastructure, and a research-intensive culture organised around independent trading teams.
Unlike European market makers such as IMC or Flow Traders, Jump generally does not use a mass online maths test as its first cut. It leans instead on direct technical interviews with traders, quants and engineers, with a futures-market and systems flavour that reflects its Chicago HFT roots.
- 1Recruiter screen. Background, motivation and which team and track you are being considered for.
- 2First technical round. One or more calls, with content that depends heavily on your track.
- 3Superday. Four back-to-back interviews, usually in Chicago, of roughly 45 to 60 minutes each.
- 4Decision. Jump moves quickly once the onsite is done.
Start to finish it typically takes 3 to 4 weeks once underway, though sourcing through an external headhunter can stretch that to months. Almost everything is conducted by traders, quants and engineers rather than by automated assessment, and the bulk of the onsite happens in Chicago, with smaller processes in New York, Amsterdam, London and Singapore.
Know your track first
The process forks into 3 tracks, and the content of every stage shifts depending on which one you are in.
| Track | What it centres on | What gets tested |
|---|---|---|
| Trader | Markets and decision-making | Probability, expected value, market intuition, futures microstructure and options |
| Quant Researcher | Statistics and modelling | Probability, statistics, OLS, linear algebra, Python data analysis, and the depth of your past projects |
| Core Dev / Software Engineer | Low-latency systems | C++, data structures, algorithms, concurrency and CPU architecture |
The stages below are shared across all three, and each notes what changes by track.
Stage 1: Recruiter screen
A recruiter or internal HR screen, sourced through campus, a direct application or an external headhunter, covering your background, your motivation and a high-level view of the role.
Two things matter here. Have a specific, researched reason for wanting Jump, because generic "top prop firm" answers do not land at a firm with this distinct an identity. And get clarity on which team and track you are being considered for, since it shapes everything that follows.
Research Jump's pit-trading history, its independent team structure and Jump Crypto, and have your motivation ready: why you want to trade and why this firm over its competitors.
Stage 2: First technical round
One or more technical phone or video interviews, weighted by track. Trader candidates get probability and expected value brainteasers alongside market reasoning. Quant candidates get probability and statistics plus basic OLS and linear algebra. Core dev candidates sit a coding screen on data structures and algorithms, usually in C++.
Jump is not as relentlessly brainteaser-obsessed as Jane Street, but probability fundamentals are non-negotiable for trader and quant candidates. Reported questions skew toward expected value, conditional probability and random walks, with a card-stopping game (deal cards, stop whenever you like, win if the next is red) coming up often enough to count as a Jump staple.
Drill the probability questions and the cards and coins collection, since that card game sits squarely in it. Practise thinking aloud: Jump cares about your reasoning and structure as much as the number.
Stage 3: The superday
Strong candidates are often flown to Chicago for four back-to-back interviews of roughly 45 to 60 minutes, each with a separate trader, quant or engineer. The standard mix is two quant or maths rounds (pen-and-paper probability, expected value games, statistics, linear algebra), one coding round, and one behavioural and fit round on your background, projects and understanding of the sector. The coding round is Python with pandas and NumPy for trader and quant tracks, and C++ on a laptop or whiteboard for engineering.
What changes by track
- Trader: a dedicated trading round on futures microstructure, options theory, HFT strategy and backtesting.
- Quant: deeper on your own projects and applied statistics.
- Core dev: low-latency data structures such as ring buffers and lock-free queues, plus concurrency and CPU architecture.
The futures depth is genuinely distinctive to Jump and is not covered by generic preparation, so even basic CME contract awareness signals you did specific homework.
How to prepare
Practise expected value games with cards, dice and coins across our market games. Trader candidates should drill make me a market style pricing and sharpen speed with the Math Trainer and our mental arithmetic guide. Review options basics, the Greeks, hedging and variance swap construction, with the option theory questions as the drill. Engineering candidates should focus on clean modern C++: RAII, sensible ownership, concurrency and low-latency structures.
Above all, build stamina. The onsite is long, and interviewers want the same structured reasoning in round four as in round one.
The technical rounds reach beyond probability into real implementation work, and the coding catalog carries a deep Jump section. A representative slice:
Closing remarks
Jump rewards deep technical ability over polish. The probability and expected value foundation is essential on every track, futures and microstructure knowledge separates serious trader candidates, and clean C++ with low-latency awareness is the dividing line for engineering roles.
Build the fundamentals until they are automatic, develop real market intuition through repeated practice, and do specific homework on Jump's history and futures focus so your motivation reads as genuine. Jump selects a small number from a highly competitive pool and most successful applicants prepare for months.
Work through everything we have for Jump, and read our full interview guide for how these stages compare across firms.