Principal Software Engineer Interview Experience
Process
The interview went pretty smoothly overall.
Technical interview: I messed it up although it was not difficult. It covered LeetCode Easy/Medium problems.
System design: I was asked to design an online banking system.
Behavioral: This is easy based on the STAR approach.
Case: There were two sections, one analytical and the other to find issues in the given code. I messed up the second section.
Questions
Given a string, check if there are exactly 3 question marks between the digits, and if the 2 digits always add up to 10. Otherwise, return false.
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Interview Statistics
The following metrics were computed from 7 interview experiences for the Capital One Principal Software Engineer role in United States.
Success Rate
Capital One's interview process for their Principal Software Engineer roles in the United States is very selective, failing most engineers who go through it.
Experience Rating
Candidates reported having good feelings for Capital One's Principal Software Engineer interview process in United States.
Capital One Work Experiences
- 3.0WLB - thing of the pastPrincipal Software Engineer • Former EmployeeSan Francisco, California, United StatesMarch 25, 2025Pros: Great coworkers, talented people. Learning opportunities. Career growth.Cons: * Stack Ranking * Politics * Not standardized comparison
- 4.0Good work/life balance. Not challengingPrincipal Software Engineer • Current EmployeeChicago, Illinois, United StatesFebruary 24, 2024Pros: - Good work/life balance - Friendly coworkersCons: - Not challenging work. - To move up, you have to manage people (even on the “IC” track).
- 5.0Strong Company CulturePrincipal Software Engineer • Current EmployeeApril 23, 2023Pros: Belief in company values. Compassion for associates during the pandemic.Cons: Increased pay to meet industry standards.
Capital One Interview Questions
