System Design Challenges

Design a scalable, reliable real-time chat system that delivers messages instantly, handles network failures gracefully, and scales to support millions of users. This challenge covers foundational distributed systems concepts including real-time communication, data consistency, fault tolerance, and performance optimization.

Design a scalable real-time voting system that allows users to create polls, cast votes, and see live results. The system must handle high-concurrency scenarios, ensure data consistency, prevent fraud, and provide real-time updates across global regions with minimal latency.

Design a scalable URL shortening service that converts long URLs into short, unique identifiers while handling scaling challenges and ensuring reliability.

Design a scalable ride-sharing platform focusing on real-time matching, geo-distribution, and reliability. Progress from basic ride matching to advanced features handling millions of concurrent users.

Design a scalable, reliable blogging platform that enables content creators to publish engaging articles, supports rich media, delivers optimized content to readers globally, handles significant user engagement, provides detailed analytics, and ensures robust security. This challenge covers fundamental concepts in content management, distributed systems, performance optimization, and data processing.

Design a highly scalable, reliable, and secure cloud file storage system that enables users to upload, download, share, and manage files with version control. This challenge covers fundamental concepts in distributed storage, access control, data consistency, and optimization techniques for handling large files across a global infrastructure.

Design a robust task management system that supports personal productivity, team collaboration, and scales to handle thousands of tasks with strong reliability and performance.

Design a scalable social network platform that supports user connections, content sharing, real-time interactions, and personalized recommendations while maintaining performance and privacy at scale.

Design a scalable inventory management system that tracks product levels across multiple warehouses in real-time, handles high-volume transactions, and maintains consistency.

Design a reliable, high-throughput notification system that delivers messages across multiple channels (push, SMS, email) with tracking and personalization capabilities.

Design a secure, reliable payment processing system that handles multiple payment methods, ensures transaction consistency, and complies with financial regulations.

Design a scalable mapping and navigation service that provides accurate directions, handles real-time traffic updates, and supports millions of concurrent users across global regions.