Start by clarifying requirements and constraints, then walk through each tier (presentation, logic, data) explaining their responsibilities, interactions, and the trade-offs involved. Emphasize scalability, availability, and security, and tie your choices back to Amazon's leadership principles and AWS services.
Pro tip: Show how you would evolve the architecture over time, starting simple and adding complexity only when needed, and discuss how you would monitor and test each tier independently.
Ask about expected scale, latency, consistency, and budget to tailor the design. This ensures you address the interviewer's specific concerns.
Describe the presentation tier (UI), logic tier (business rules), and data tier (storage), and what each should handle. Explain how they communicate via well-defined APIs.
Select appropriate technologies (e.g., React for UI, Node.js for logic, DynamoDB for data) and patterns (e.g., REST, caching, load balancing). Justify choices with trade-offs.
Discuss scalability (horizontal scaling, auto-scaling), availability (multi-AZ, redundancy), security (auth, encryption), and monitoring (logging, metrics).
Recap the design, highlight how it meets requirements, and suggest potential improvements or next steps. Invite feedback.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.