← Cloudkitchens Interview Insights
Two hours of hand-coding and I thought I had something reasonable.
Start by clarifying the requirements and constraints of the order management system, including the expected API endpoints, data model, and test cases. Then outline a simple, testable architecture using a lightweight framework and in-memory storage, emphasizing clean separation of concerns. Finally, discuss trade-offs and potential extensions for production readiness.
Pro tip: Focus on making the system easily testable by designing clear, deterministic endpoints and using dependency injection for storage, so you can swap implementations for tests. Also, mention how you would handle idempotency and concurrency to show maturity.
Ask about the expected API endpoints (e.g., create order, get order, update status), data model, and any specific test cases. Confirm non-functional requirements like performance, scalability, and persistence.
Define RESTful endpoints with clear request/response schemas, status codes, and error handling. Consider using OpenAPI for documentation and validation.
Propose a simple layered architecture (controller, service, repository) and a lightweight stack (e.g., Python Flask/FastAPI, Node.js Express). Use in-memory storage for simplicity, but abstract it for easy replacement.
Explain how you would write unit and integration tests, mock dependencies, and handle edge cases like duplicate orders, invalid inputs, and concurrent updates.
Talk about trade-offs (e.g., in-memory vs. database, sync vs. async) and how you would evolve the system for production (persistence, authentication, monitoring).
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.