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Mar 2026
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
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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.
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