| Feature | Description | |---------|-------------| | | Drag-and-drop to build system architecture | | Real-time traffic estimator | Sliders for QPS, storage growth, latency | | Side-by-side trade-offs | Compare caching strategies, DB sharding keys | | Database schema visualizer | ER diagrams with auto-scaling hints | | Load testing simulator | Show bottlenecks as traffic spikes | | Step-by-step prompt generator | Guided system design interview flow |
, a platform dedicated to technical interview preparation. His teaching philosophy emphasizes a first-principles approach, moving away from rote memorization of patterns toward a deep understanding of trade-offs in distributed systems. Core Educational Contributions gaurav sen system design
: The paid InterviewReady course includes a "System Design Game" for hands-on practice, live classes for doubt clearing, and curated summary PDFs. | Feature | Description | |---------|-------------| | |
A fan favorite. Here, Sen moves beyond simple request-response to and Long Polling . He addresses the "Last Seen" timestamp problem and how to handle presence detection across millions of concurrent connections. He famously contrasts REST APIs (Stateless) with WebSocket Servers (Stateful) and explains how to scale the latter using Redis Pub/Sub. A fan favorite
This is one of his most popular and comprehensive pieces. It walks through a complete system design interview from scratch, covering: