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Principal Software Engineer Interview Questions

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2,047 principal software engineer interview questions shared by candidates

Closest thing to a "coding" interview was a few mock PRs in the language required for the role. We went through a few different approaches to solving a particular problem and discussed the bottlenecks and potential pitfalls of each, with a focus on concurrency.
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Principal Software Engineer

Interviewed at Elastic

3.8★
Jul 31, 2020

Closest thing to a "coding" interview was a few mock PRs in the language required for the role. We went through a few different approaches to solving a particular problem and discussed the bottlenecks and potential pitfalls of each, with a focus on concurrency.

Oracle OCI principal engineer interview process 1. screening round - past projects done and a coding question (LC easy to medium) sum 2 large decimal numbers 2. class design question - Mine sweeper game 3. managerial interview - purely behavioral and past projects 4. coding round (LC easy to medium) - sliding window log ratelimilter based duplicate rejection 5. Bartender round - behavioral question 6. HLD design round - IOT data collection system
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Principal Software Engineer

Interviewed at Oracle

3.5★
Dec 8, 2023

Oracle OCI principal engineer interview process 1. screening round - past projects done and a coding question (LC easy to medium) sum 2 large decimal numbers 2. class design question - Mine sweeper game 3. managerial interview - purely behavioral and past projects 4. coding round (LC easy to medium) - sliding window log ratelimilter based duplicate rejection 5. Bartender round - behavioral question 6. HLD design round - IOT data collection system

I was asked a series of questions ranging from leadership topics to more detailed engineering and data science questions. For example, was asked for specifics (but not low-level details) on how some machine learning algorithms worked, to test my breadth and depth of knowledge.
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Principal Software Engineer II

Interviewed at Elastic

3.8★
Jun 4, 2019

I was asked a series of questions ranging from leadership topics to more detailed engineering and data science questions. For example, was asked for specifics (but not low-level details) on how some machine learning algorithms worked, to test my breadth and depth of knowledge.

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