Principal Engineer Interview Questions

4,346 principal engineer interview questions shared by candidates

Screening: Started with knowledge questions about fundamentals in my field, then a scripting questions (processing data with command line tools), and 2 fairly easy coding questions (and you can run tests; a breeze if you do program). On-site: Industry standard back to back interviews with 2 design, 2 coding, and 1 behavioral. For me there was also an additional design interview with a role specific question.
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Principal Engineer

Interviewed at Roblox

3.8
Mar 6, 2021

Screening: Started with knowledge questions about fundamentals in my field, then a scripting questions (processing data with command line tools), and 2 fairly easy coding questions (and you can run tests; a breeze if you do program). On-site: Industry standard back to back interviews with 2 design, 2 coding, and 1 behavioral. For me there was also an additional design interview with a role specific question.

Design a system for ingesting 100 million logs per day from various cloud providers, running "queries" against the logs and sending results to B2B customers' on prem monitoring systems (plus quite a few other requirements).
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Principal Software Engineer

Interviewed at Vectra AI

3.9
Dec 22, 2024

Design a system for ingesting 100 million logs per day from various cloud providers, running "queries" against the logs and sending results to B2B customers' on prem monitoring systems (plus quite a few other requirements).

C# Fundamentals are covered very heavily. Also like CS101 data structures are covered very heavy. We also look for good skills in UI design and development such as Javascript and AngularJS. If you are good at the backed we go over some pretty detailed threading questions. If you do good on all these subjects then we may move into more advanced areas like deep database development\data analytics skills covering SQL, Oracle, and various other skills.
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Principal Software Engineer

Interviewed at Itron

3.9
Aug 5, 2015

C# Fundamentals are covered very heavily. Also like CS101 data structures are covered very heavy. We also look for good skills in UI design and development such as Javascript and AngularJS. If you are good at the backed we go over some pretty detailed threading questions. If you do good on all these subjects then we may move into more advanced areas like deep database development\data analytics skills covering SQL, Oracle, and various other skills.

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