Design Food Delivery Service

Functional Requirements

1. User Registration and Authentication

   • Users can sign up and log in using email, phone number, or social media accounts.
   • Implement secure authentication mechanisms.

2. Restaurant Listings

   • Display a list of restaurants based on user location.
   • Provide restaurant details including menu, ratings, and reviews.

3. Menu Browsing and Search

   • Users can browse menus and search for specific dishes or cuisines.
   • Filter options for dietary preferences and price range.

4. Order Placement

   • Users can add items to a cart and place an order.
   • Support for special instructions and customization of orders.

5. Payment Processing

   • Integrate with multiple payment gateways for credit/debit cards, digital wallets, etc.
   • Ensure secure transaction processing.

6. Order Tracking

   • Real-time tracking of order status from preparation to delivery.
   • Notifications for order updates.

7. Delivery Management

   • Assign orders to delivery personnel based on location and availability.
   • Optimize delivery routes for efficiency.

8. Customer Support

   • Provide in-app chat or call support for order-related queries.
   • Feedback and complaint management.

9. Promotions and Discounts

   • Implement promotional codes and discounts for users.
   • Track usage and effectiveness of promotions.

10. Review and Rating System

    • Allow users to rate and review restaurants and delivery experiences.
    • Display aggregated ratings for restaurants.

Non-Functional Requirements

1. Scalability

   • The system should handle a large number of concurrent users and orders.
   • Ensure the architecture supports horizontal scaling.

2. Performance

   • Fast response times for user interactions, especially during peak hours.
   • Efficient data retrieval and processing.

3. Reliability

   • Ensure high availability and minimal downtime.
   • Implement failover mechanisms and data redundancy.

4. Security

   • Protect user data and payment information with encryption.
   • Implement robust authentication and authorization protocols.

5. Data Consistency

   • Ensure data integrity across all components of the system.
   • Implement mechanisms for eventual consistency where necessary.

6. Flexibility

   • Support for adding new features and integrations with minimal disruption.
   • Modular design to accommodate future changes.

7. Localization and Internationalization

   • Support multiple languages and currencies.
   • Adapt to regional legal and cultural requirements.

8. Accessibility

   • Ensure the platform is accessible to users with disabilities.
   • Adhere to accessibility standards and guidelines.

9. Latency

   • Minimize latency in data transmission and processing.
   • Optimize network and server performance.

10. Monitoring and Logging

    • Implement comprehensive monitoring of system performance and user activity.
    • Maintain detailed logs for auditing and troubleshooting.