Jump Trading software engineering interview questions

The Process

Five rounds, and the one that cuts most people is probability

01

70 to 90 minAuto graded

Online assessment

Jump filters on the assessment before a person is involved: two to four hard algorithm problems, timed and auto marked. It is the one stage where conventional LeetCode grinding genuinely helps, which is why it is worth saying so.

Treat it as the real first round.
Most applications end here. There is no recruiter to explain a near miss, and the score is the whole decision.
Write C++ if the role is C++.
The assessment usually allows several languages, but the engineers reading a borderline submission are reading it as C++.
Budget time for the probability item.
It sits among the coding problems and is worth as much as one of them. Candidates who leave it last usually leave it blank.

02

20 minPhone call

Recruiter call

Short and logistical, and it lands after the assessment rather than before it, which catches people who assumed they had time to prepare. Ask about sponsorship here: Jump files its visas under Jump Operations LLC, not Jump Trading LLC.

Ask which desk the role sits on.
Futures, options, equities and the crypto group run their own loops and their own bonus pools out of what they trade.
Do not expect a compensation band.
Base is quotable, the bonus is not. Recruiters will not put a number on the part of the offer that is most of the offer.
Say which office you actually mean.
Chicago, New York, London and Singapore hire separately, and moving your application between them restarts it.

03

60 minShared editorNo AI tools

C++ and systems screen

Live with an engineer. Modern C++ at the level the production code uses, then questions about caches, memory ordering and what the hardware is actually doing underneath.

Know why your code is fast, not that it is.
Cache lines, false sharing, branch prediction. Saying a structure is faster without saying which of these it fixes reads as guesswork.
Move semantics come up unprompted.
Copies on a hot path are the thing they are listening for. RAII, moves and allocation behaviour are assumed, not tested politely.
Say what you would measure.
Perf counters, a profiler, a histogram of latencies. An answer with no measurement in it does not survive the follow up.

04

45 minNo codeVideo call

Probability screen

Mental arithmetic, expected value and conditional probability, asked conversationally and at speed. This is the round strong engineers walk into unprepared and lose.

Work out loud, cleanly.
They are watching how you set the problem up. A right answer with no visible reasoning scores worse than a careful wrong one.
Expected value first, always.
Most of these puzzles reduce to comparing an expected value against a stopping rule. Name that structure before you compute.
Practise arithmetic without a calculator.
Fractions, percentages and small combinatorics at conversational speed. Slow mental maths reads as uncertainty about the maths.

05

4 to 6 roundsOne day

Final onsite

Four to six back to back rounds: coding with performance budgets attached, a deeper low latency systems discussion, a behavioural round on whether you want Jump specifically, and a manager conversation. A trader sits in on one round at most.

Traders ask about risk, not elegance.
What breaks, how you would know, and how fast you could turn it off. Answer in those terms and the round goes well.
Have a reason for a secretive firm.
Jump publishes almost nothing. Wanting to work somewhere you cannot read about needs a better answer than money.
The bar does not bend for a strong day.
One unconvincing round ends it. Jump hires very few engineers a year and would rather miss a good one than take a risk.

Levels and Pay

No equity exists here, and the bonus is not published

Pick a level to see how the package splits, what changes by city, and what the loop actually asks of you at that band.

Chicago

New York

London

Singapore

Level	Experience	Total comp
Software Engineer ISE1Entry	0 to 2 yrs	~$300K
Software EngineerSEMid	2 to 4 yrs	~$400K
Senior EngineerSSESenior	4 to 8 yrs	~$550K
Staff EngineerSTAFFStaff	8 to 12 yrs	~$800K
Lead EngineerLEADLead	12+ yrs	~$1.2M

Live Question Feed

What Jump Trading is asking right now

26 questions · new ones added every 7 days

26 Verified

CODING

Implement a lock free single producer single consumer ring buffer, then justify every memory ordering you chose.

C++ and systems screen

60 min

Shared editor

Reported 5 times

Open

PROBABILITY

I deal cards face up from a shuffled deck. You may stop me once. If the next card is red you win. What now?

Locked

SYSTEMS

A hot path misses cache on every tick. Walk me through how you find it and what you change.

Locked

CODING

Write a fixed size allocator for messages that never calls malloc on the trading path.

Locked

MARKETS

Explain what happens to a resting limit order when the exchange changes its matching priority.

Locked

PROBABILITY

One pass of bubble sort runs on a shuffled array. What is the chance it comes out sorted?

Locked

CODING

Parse a binary market data feed with no copies and no branches on the common path.

Locked

SYSTEMS

You have kernel bypass, pinned cores and hugepages. Which one do you give up first, and why?

Locked

CULTURE

Why a private firm nobody outside finance has heard of, rather than a rival you could name?

Locked

25 more questions available

The exact questions Jump Trading is asking this week, tagged by round and difficulty.

Unlock All 26 Questions

Each question stays in the bank for 14 days, so everything here was asked in the last 14 days. Candidates who see them first pass at 3.2 times the normal rate.

Get Full Access

The Unfair Advantage

Why this actually works

01

Real questions, not guesses

Collected from engineers who sat the loop, then cross validated against other intel sources.

02

Fresh every week

The database updates every 7 days, so you never study stale problems.

03

Covers every round

The timed assessment, the C++ and systems screen, the probability round and the trader onsite.

04

120+ companies tracked

Also interviewing at Citadel Securities, Hudson River Trading or Optiver? We have their questions too.

05

Difficulty and pattern data

Tagged by difficulty, round and category, so you know where prep time goes.

06

Candidate verified only

Reported by a candidate, then cross verified against multiple data points.

3.2×

Higher pass rate

120+

Companies tracked

3.2K+

Engineers using this

FAQ

Common questions

How are the questions sourced?

Directly from engineers who interviewed at Jump Trading, then cross validated against other intel sources into a stack ranked list.

How often are questions updated?

We add new questions every 7 days and retire each one after 14 days, so the bank turns over twice in the window it covers. Jump hires in small numbers and rotates its problems hard, so the pool turns over faster than the volume suggests.

Does Jump Trading ask LeetCode questions?

Only in the timed assessment, and at the hard end. The live rounds are modern C++, cache behaviour and probability, which no amount of pattern grinding covers.

Can I use AI tools in the interview?

Not in the live rounds. They run on a shared editor with an engineer watching, so there is nowhere to hide a model. Jump has published nothing about the timed assessment either way.

What is the probability screen?

Mental arithmetic, expected value and conditional probability asked at conversational speed. Jump uses it as a hard filter, and strong engineers routinely fail it.

What does Jump Trading pay a Software Engineer?

Around $400K in Chicago, and the same in New York, because Jump posted an identical band for both cities. Roughly £220K in London. Half of it is a discretionary bonus, and there is no stock because the firm is private.

How long does the process take?

Three to five weeks when it moves. Jump runs a small process quickly, and a single unconvincing round ends it rather than sending you to another.

Is this just for Jump Trading?

No. GothamLoop covers 120+ companies including Citadel Securities, Hudson River Trading, Optiver, Google and Amazon.

The Jump Trading interview cheat code nobody talks about

Five rounds, and the one that cuts most people is probability

Online assessment

Recruiter call

C++ and systems screen

Probability screen

Final onsite

No equity exists here, and the bonus is not published

What Jump Trading is asking right now

Why this actually works

Real questions, not guesses

Fresh every week

Covers every round

120+ companies tracked

Difficulty and pattern data

Candidate verified only

Common questions

Pricing plan

Company Interview Guides