Explain your project system design

Q: Explain your project system design

This question evaluates system design and architecture competencies, including defining functional and non-functional requirements, high-level service and data architecture, data modeling, scalability, resilience, observability, and operational validation.

Q: How do I approach System Design interview questions?

System Design questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master system design interviews.

Question

System Design Walkthrough: Project You Owned

Context: In an onsite system design interview for a Software Engineer role, you are asked to walk through a recent project you owned end-to-end. If you cannot share proprietary details, use a representative, sanitized example.

Your walkthrough should cover:

Functional requirements
Non-functional requirements (SLOs, latency, durability, security, cost)
High-level architecture (services, data stores, messaging)
Data flows (ingest, process, store, query)
Scaling strategies and capacity planning
Consistency vs. availability trade-offs (and why)
Schema/data modeling choices
Performance bottlenecks and optimizations
Failure handling and resilience
Observability, SLOs, and operations
Key design decisions and alternatives considered (and trade-offs)

Be explicit about assumptions, constraints, and how you validated the design (load tests, chaos, data correctness).

Explain your project system design

System Design Walkthrough: Project You Owned

Solution

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Explain your project system design

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System Design Walkthrough: Project You Owned

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