How do you design a scalable food delivery application system?
This open-ended system design question asks you to architect a solution covering user roles, core features, database schema, and scalability considerations for a complex platform.
Why Interviewers Ask This
System design questions assess your ability to think holistically about software architecture, including APIs, databases, caching, and microservices. They test your experience with scalability, reliability, and handling high concurrency typical of modern consumer applications.
How to Answer This Question
Define user roles: customers, restaurants, and delivery personnel. Identify core features: ordering, tracking, payments. Propose a microservices architecture. Discuss database choices for orders and locations. Address scaling strategies like load balancing and caching. Consider real-time updates for order status.
Key Points to Cover
- User role definition
- Microservices architecture
- Database selection
- Scalability and caching
Sample Answer
Designing a food delivery app starts with identifying three main user roles: customers, restaurants, and delivery partners. Core features include menu browsing, order placement, payment processing, and real-time tracking…
Common Mistakes to Avoid
- Overlooking real-time requirements
- Ignoring payment security
- Single point of failure in design
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