Principal Software Engineer Interview Questions

10,176 principal software engineer interview questions shared by candidates

Round 1: coding round, 2 leetcode problem, 1 medium, 1 hard - Leetcode no - 64. Minimum Path Sum,295. Find Median from Data Stream Round 2: HM round, current project and some design questions Round 3: Architect round, current project and LeetCode Medium 240. Search a 2D Matrix II Round 4: Current project and Kafka Internals
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Principal Software Engineer

Interviewed at Saviynt

4
Jul 29, 2025

Round 1: coding round, 2 leetcode problem, 1 medium, 1 hard - Leetcode no - 64. Minimum Path Sum,295. Find Median from Data Stream Round 2: HM round, current project and some design questions Round 3: Architect round, current project and LeetCode Medium 240. Search a 2D Matrix II Round 4: Current project and Kafka Internals

1) How would you parse a large (60GB) log file into a csv and what language would you use for it. 2) Describe what happens in the browser when a user visits an address. The questions are senior level at most. Also, tip, even though the first question is more of a sysadmin than developer one make sure to answer that you'd use JavaSCript because to them, JavaScript is the best thing since sliced bread. The interviewers felt like they were senior devs with inflated titles. The questions should be easy but they are really look for something very specific and something that they themselves understand.
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Principal Developer

Interviewed at Security Compass

4.1
Apr 2, 2023

1) How would you parse a large (60GB) log file into a csv and what language would you use for it. 2) Describe what happens in the browser when a user visits an address. The questions are senior level at most. Also, tip, even though the first question is more of a sysadmin than developer one make sure to answer that you'd use JavaSCript because to them, JavaScript is the best thing since sliced bread. The interviewers felt like they were senior devs with inflated titles. The questions should be easy but they are really look for something very specific and something that they themselves understand.

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