How to Answer Ride Request Handling at Uber

To design a backend system for concurrent ride requests, I would use a microservices architecture with an API gateway to handle incoming requests. The load balancer would distribute these requests across multiple service instances that manage ride assignments. I would implement a message queue to decouple the request handling from the ride assignment logic to ensure that requests are processed asynchronously and to manage spikes in traffic. For data integrity, I'd use optimistic locking to manage concurrent modifications to ride requests, ensuring that only one ride is assigned successfully. To provide real-time updates, I would utilize WebSockets to push updates to the user’s app, ensuring they receive instant information about their ride status. This approach would allow the system to scale with user demand while maintaining a responsive user experience.