A process built on interviews, not screens
Jump publishes its openings rather than a stage-by-stage process, so everything in this section is candidate reporting and should be read as such.
The most consistently reported feature is a structural one: unlike several European market makers, Jump generally does not use a high-volume online mathematics test as a first elimination round. Candidates describe a recruiter conversation, a first technical round, and an onsite of several back-to-back interviews, conducted by traders, quants and engineers directly rather than through an automated assessment.
If that holds for your process, the practical consequence is significant: there is no screen to grind for, and the marginal hour is better spent on being interviewed well by a technical person than on arithmetic drills.
What candidates report being tested on
A strong systems and futures-market flavour comes through consistently in these reports, which is unsurprising for a firm with Chicago high-frequency-trading roots. For engineering tracks, C++ and algorithm design come up repeatedly. For trading and quant tracks, probability and mathematics carry the technical weight.
Because there is no standard published script, prepare for depth in your own track rather than breadth across all of them.
What to prepare
Talk technically with a technical person. If the whole process is live interviews, the skill being sampled is reasoning under questioning, not test-taking.
C++ and algorithms, for engineering tracks. Reported to be substantive.
Probability and mathematics, for trading and quant tracks.
Something to say about markets. Interviews conducted by working traders tend to drift toward what you find interesting and why.
Practise the same formats
The question sets below are ours, written in the formats this process is reported to use. They are not Jump Trading's questions, and nothing here reproduces any part of its assessment.