Design booking and settlement systems
Design a Reserved-Seat Ticketing Platform
Design a backend system for a reserved-seat ticketing platform, similar to those used for concerts or sports events. The system should allow users to browse a venue seat map, select specific seats, place a temporary hold on them, and then complete the checkout process.
Core Requirements
- Seat Selection & Hold: Users must be able to select available seats and place a temporary hold on them.
- Checkout Process: Users should be able to complete a purchase for their held seats.
- Concurrency Control: The system must robustly prevent double booking, especially when many users attempt to purchase the same seat simultaneously.
Discussion Points
- API Design: Detail the RESTful or RPC API endpoints for browsing, holding, and purchasing seats.
- Backend Responses: Describe what data the backend should return to the frontend for various operations.
- Frontend Rendering: Explain how the frontend should interpret backend responses to render seat availability and user-specific seat states (e.g., available, held by me, held by others, purchased).
- Failure Handling: Address how the system handles various failures, such as payment processing errors or network issues.
- Hold Expiration: Design a mechanism for temporary holds to expire gracefully if a user does not complete checkout within a specified timeframe.
- User Experience during Contention: Discuss strategies to maintain a reasonable user experience when high demand leads to contention for popular seats.
AI interview prep
Core dilemma
Balancing strong consistency requirements (no double booking) with high availability and low latency under extreme contention, while ensuring a robust user experience and graceful failure handling.
3 tradeoffs and 3 stress tests locked
Interview prep
Unlock the interviewer X-Ray rubric, tradeoff matrix, stress tests, clarifying questions, and key concepts.
Design booking and settlement systems
Design a Reserved-Seat Ticketing Platform
Design a backend system for a reserved-seat ticketing platform, similar to those used for concerts or sports events. The system should allow users to browse a venue seat map, select specific seats, place a temporary hold on them, and then complete the checkout process.
Core Requirements
- Seat Selection & Hold: Users must be able to select available seats and place a temporary hold on them.
- Checkout Process: Users should be able to complete a purchase for their held seats.
- Concurrency Control: The system must robustly prevent double booking, especially when many users attempt to purchase the same seat simultaneously.
Discussion Points
- API Design: Detail the RESTful or RPC API endpoints for browsing, holding, and purchasing seats.
- Backend Responses: Describe what data the backend should return to the frontend for various operations.
- Frontend Rendering: Explain how the frontend should interpret backend responses to render seat availability and user-specific seat states (e.g., available, held by me, held by others, purchased).
- Failure Handling: Address how the system handles various failures, such as payment processing errors or network issues.
- Hold Expiration: Design a mechanism for temporary holds to expire gracefully if a user does not complete checkout within a specified timeframe.
- User Experience during Contention: Discuss strategies to maintain a reasonable user experience when high demand leads to contention for popular seats.