Gaurav Sen System Design Review

His breakthrough came from deconstructing complex systems like YouTube, WhatsApp, and Uber into modular building blocks. Today, resources (including his free YouTube channel and the paid "System Design Interview" course) are used by over a million engineers annually. His approach is uniquely practical: He teaches you how to think , not what to memorize. The Core Philosophy: The "LLD to HLD" Continuum One of the first concepts you learn in the Gaurav Sen system design framework is the distinction between Low-Level Design (LLD) and High-Level Design (HLD). While LLD focuses on classes, interfaces, and specific functions (OOP), HLD focuses on servers, databases, load balancers, and message queues.

Remember Gaurav’s most famous advice: "In system design, there is no 'right' answer; only the 'least wrong' answer given your constraints."

Start with the basics: Consistent Hashing and Load Balancing. Move to the case studies: YouTube and Uber. Finally, practice the trade-offs every day.