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Coding: A LeetCode-style problem where you need to "flip K most ones" to get the maximum island (likely Max Consecutive Ones III), with a follow-up question asking how to handle it if the island is in a circular array.
System Design: Design a system to discard DDoS packets.
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- Coding problems seemed more implementation intense, it seems the interviewers have a strong emphasis on writing clean, understandable code. Communication and collaborating with the interviewer also appears important, solving the problem perfectly doesn't seem to be as important as you might expect.
One of the system design interviews was walking through a system you developed (I believe system design questions are only asked to lateral/experienced applicants).
I was not asked any explicit behavioral questions outside of the typical ones you might expect when retrospecting during the "walk through a system you developed" interview. I am told Jane Street doesn't have behavioral rounds for engineers in general.
System design
- Behavior - project deep dive
Two coding with open follow-up questions
System Design
System design
- coding: I forgot, sorry
system design: design ticketmaster
culture: talk about past project; when you disagreed with a peer; how I resolved dissagreements, etc.
System design
- - 1st round was simple 1D dp problem
- 2nd round was graph problem (Djikstra's) and ML system design
System design
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Coding: A LeetCode-style problem where you need to "flip K most ones" to get the maximum island (likely Max Consecutive Ones III), with a follow-up question asking how to handle it if the island is in a circular array. System Design: Design a system to discard DDoS packets.
Reported Dec 2025 · 1 source report
Software Engineer
Source snapshot: Nov 12, 2026
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