DE Shaw Lead Principal Software Engineer Interview Experience
Question Details
Round 1 Behavioral & Leadership: - questions around review processes for designs, dealing with disagreements, etc. -
Coding A city which consists of buildings (skyscrapers) of different floors in
Full Details
Round 1 Behavioral & Leadership: - questions around review processes for designs, dealing with disagreements, etc. -
Coding A city which consists of buildings (skyscrapers) of different floors in a straight line, ex: floors arr = [5, 2, 9, 3]. You can only demolish some floors from a building, but can’t construct them. But the floors demolished will add into your cost. If a building is entirely demolished, it disappears from the city. Bring all the buildings to the same height by using Least Demolition Cost. O(n*log n) time, O(1) space. - Java Concurrency: - Write two threads, one thread only prints odd numbers, one thread only even. But eventually the numbers should be printed in sequential order. - Multi-threading Trivia like no. of ways of creating a thread, difference between thread created by extending thread and implementing runnable. - Design a concurrent hash map. --- # On-site Interviews #
Round 1 LLD of Food Delivery app like Swiggy / Zomato. - LLD of a Job Scheduler Library, where you submit a job, and give a schedule for running repeatedly, like every 30 minutes, every 6 hours, etc. - Behavioral, Leadership, Management: - Questions around disagreement with stakeholders, push-back scenarios, etc. #
Round 2 Something similar to Leetcode 380 - LLD of Uber: More in-depth questions about ride matching, and improving satisfaction for users. - Behavioral, Leadership, Management: - Situations and experiences about a report underperforming, taking initiative for a project, etc. #
Round 3 HLD Google Docs: More in-depth conversation about OT layer. - LLD of a coupon management system. - More questions about past projects. Data Models, designs etc. - Behavioral, Leadership, Management: - Questions around keeping senior leadership, execs in loop for a project, juggling multiple responsibilities per day, etc. #
Round 4 HR Round - What motivates you - What kind of role do you see ideal - Rate these while choosing your next job: Brand Name, Role, Pay, Location, etc. - Other trivial questions. PS: Absolutely will not respond to questions like "how did you apply?". Please stick to the post in discussions. I was cooked with lot of LLD questions, and apparently that's the norm there.
About This Question
This is a reported interview question from a d.e. shaw interview for a swe role (principal level) during the onsite round reported in 2026.
It covers the following topics: Hash Table, Os, Concurrency, System Design, Behavioral .
More D.E. Shaw Interview Questions
About D.E. Shaw Interview Reports
This question was reported by a candidate who interviewed at D.E. Shaw. LeakCode aggregates interview reports from 10+ sources, including 1Point3Acres, Glassdoor, LeetCode Discuss, Blind, Reddit, Indeed, and Nowcoder. Each report is translated where necessary, deduplicated against existing entries, and tagged by company, role, round type, and reporting date.
Use this question as one calibration data point, not a memorization target. Companies typically rotate their question pools every 2-4 months; the exact wording of a 2024 question may differ from what you encounter today. The underlying pattern, difficulty level, and follow-up depth at D.E. Shaw are the higher-signal extractions to take from this report.
For broader preparation context, the D.E. Shaw interview process typically includes a recruiter screen, one or two technical phone screens, and a 4-5 round on-site loop covering coding, system design (at L4+ levels), and behavioral. Reports tagged on LeakCode show the round-by-round distribution and typical difficulty calibration. To browse questions filtered by round type and seniority, use the company hub linked above.
How To Practice This Type of Question
Solve similar problems on LeetCode under timed conditions (25-35 minutes per medium difficulty). The goal is pattern recognition: recognize the underlying technique (sliding window, two-pointer, BFS, memoized recursion, etc.) within 60-90 seconds of reading. Strong candidates verbalize their hypothesis out loud before coding, then iterate based on feedback. Weak candidates dive into implementation immediately, lose time on the wrong approach, and run out of time for follow-ups.
Companies update their question pools every 2-4 months. The exact wording of any given question may have been retired by the time you interview. Focus your prep on the pattern, not the specific problem. The patterns that appear in D.E. Shaw reports consistently are the ones worth investing in; one-off niche problems are not.
During Your D.E. Shaw Round
Apply the standard interview round template: clarify requirements (2-3 minutes), state your approach out loud and confirm direction with the interviewer (3-5 minutes), code with narration (15-25 minutes), test with concrete examples including edge cases (5 minutes), discuss optimization or trade-offs if time permits (5 minutes). This template is universally accepted across FAANG and adjacent companies; deviating from it produces weaker interviewer feedback signal.
The single most predictive failure mode in D.E. Shaw reports tagged "no hire": not asking clarifying questions. Interviewers are explicitly trained to weight this. Strong candidates ask 3-5 clarifying questions even on problems that look obvious; weak candidates dive into code immediately. The clarifying-question check is often the first signal recorded in the interviewer's written notes.