Design a Video Streaming Service
Last updated: September 27, 2025
Quick Overview
Design a real-time video streaming system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Snowflake
September 27, 202528
7
4,104 solved
Design a real-time video streaming system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Software engineering fundamentals questions at Snowflake test your understanding of core CS concepts and their practical application. This Onsite question evaluates how you apply engineering principles to build maintainable, scalable software.
What the Interviewer Expects
- Explain the concept clearly with a practical example
- Discuss when and why to apply this principle
- Identify common mistakes and anti-patterns
- Compare with alternative approaches
Key Topics to Cover
How to Approach This
- Apply SOLID principles. Single Responsibility makes code testable, Open/Closed makes it extensible.
- Choose data structures based on access patterns, not familiarity.
- Prefer immutable data and message passing over shared mutable state for concurrency.
- Design APIs with RESTful conventions, versioning, meaningful errors, and pagination from day one.
Possible Follow-up Questions
- What testing strategy would you use for this component?
- How would this design change if the team size doubled?
- How would you document this for other engineers?
- What are the security implications of this design?
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Core Design Principles
For a video streaming service like the one we are designing for Snowflake, several core design principles apply:
- Separation of Concerns: This principle helps in organizing the system into dist...
Architecture
A microservices architecture would be appropriate for this video streaming service. Key components include:
- Ingestion Service: Handles uploading and initial processing of video files.
- **Tra...
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