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