Process
There were two rounds of phone interviews. Both were technical and consisted of only one question each.
The first round was easy and could be easily solved in OCaml.
The second round presented a more difficult question that did not require OCaml. I don't remember the exact question, but it was a coding question that required mathematical insights. This means it demanded quick interpretation of the question and a grasp of the underlying mathematics.
Questions
Find the k-th child of a node in a tree. Use OCaml.
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Interview Statistics
The following metrics were computed from 75 interview experiences for the Jane Street Software Engineer role in United States.
Success Rate
Jane Street's interview process for their Software Engineer roles in the United States is extremely selective, failing the vast majority of engineers.
Experience Rating
Candidates reported having very good feelings for Jane Street's Software Engineer interview process in United States.
Jane Street Work Experiences
- 5.0Highly Recommend, Great ExperienceSoftware Engineer • Former EmployeeApril 22, 2021Pros: Good experience, would highly recommend.Cons: Did not experience any major cons.
- 4.0Much better in the early daysSoftware Engineer • Current EmployeeJuly 17, 2023Pros: Compensation, benefits, work, smart people. It used to be very collaborative, but now it's occasionally collaborative. Making Markets is fun and interesting to study and learn about. In earlier days, prioritizing work-life balance was done well, as it was needed for ambitious workers.Cons: Silos, secrecy, lack of transparency, no distribution of common tools leading to tool redundancy, project ideation easily and often shot down, egos, and work-life balance has gotten worse over the years.
- 4.0Nice People, Tough WorkSoftware Engineer • Former EmployeeNew York, New York, United StatesAugust 21, 2025Pros: Had a lot of intern activities, and people were nice.Cons: Work was difficult, and sometimes evaluation metrics were unclear.
Jane Street Interview Questions
