Walk through the HLD of your best past project

Question

Walk the interviewer through the high-level design of your most significant past project. Expect cross-questions on the decisions you made.

What to cover

• The problem and its core functional and non-functional requirements
• Major components and how they interact
• Data storage and the key data flows
• Scaling, reliability, and the trade-offs you chose

Tips

Draw the component diagram and be ready to defend each decision under follow-up questions.