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4,346 principal engineer interview questions shared by candidates

The 1.5-hour pair programming question was not like your typical LeetCode question. It simulated a type of problem that you would solve at a bank/credit card company. The focus was algorithmic implementation; not so much OOP concepts.
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Principal Software Engineer

Interviewed at Capital One

3.6★
Dec 17, 2024

The 1.5-hour pair programming question was not like your typical LeetCode question. It simulated a type of problem that you would solve at a bank/credit card company. The focus was algorithmic implementation; not so much OOP concepts.

Tech Topics: Microservice Architecture, Domain-Driven Design, Event-driven architecture, CQRS, Cloud services, Containerization, C# language (in-depth), Maintainable code, API design, RESTful services, CQS, Design Patterns, SOLID principles, Information hiding, Test-Driven Development, Unit testing, CI/CD, Specific services such as service bus, Redis, RabbitMQ, virtual machines, switches. DevOps. Azure/AWS. Database design, performance, versioning, and schema updates. iHerb current and future architecture. Dev/Collaboration Topics: Software Development Lifecycle: Analysis-Design-Implementation-Deployment, Code reviews, Scrum/Agile Practices, My strong points, My weak points. How I handle conflict or under-performing workmates. Do I enjoy mentoring and teaching? What are my objectives in applying for iHerb? Given a theoretical set of requirements, how would I translate those into an architectural design? How would I name methods and organize namespaces?
avatar

Principal Software Engineer

Interviewed at iHerb

3.8★
Dec 16, 2020

Tech Topics: Microservice Architecture, Domain-Driven Design, Event-driven architecture, CQRS, Cloud services, Containerization, C# language (in-depth), Maintainable code, API design, RESTful services, CQS, Design Patterns, SOLID principles, Information hiding, Test-Driven Development, Unit testing, CI/CD, Specific services such as service bus, Redis, RabbitMQ, virtual machines, switches. DevOps. Azure/AWS. Database design, performance, versioning, and schema updates. iHerb current and future architecture. Dev/Collaboration Topics: Software Development Lifecycle: Analysis-Design-Implementation-Deployment, Code reviews, Scrum/Agile Practices, My strong points, My weak points. How I handle conflict or under-performing workmates. Do I enjoy mentoring and teaching? What are my objectives in applying for iHerb? Given a theoretical set of requirements, how would I translate those into an architectural design? How would I name methods and organize namespaces?

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