Gaurav Sen System Design (Premium — Handbook)

: He breaks down essential building blocks such as load balancing, caching strategies (e.g., Redis), message queues (e.g., Kafka), and database sharding. By explaining how these individual pieces function, he equips engineers with the tools to assemble larger, more complex architectures. Case Studies

One of the first concepts you learn in the 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. gaurav sen system design

One of his greatest contributions is the clear demarcation between High-Level Design (HLD) —the load balancers, the microservices, the data flow—and Low-Level Design (LLD) —the class diagrams, design patterns, and specific code logic. Before Sen, these were often lumped together confusingly. Now, engineers have a roadmap for exactly how to answer each phase of the interview. : He breaks down essential building blocks such

and the importance of choosing between consistency and availability based on specific business needs. Practical Building Blocks While LLD focuses on classes, interfaces, and specific

This is one of his most popular and comprehensive pieces. It walks through a complete system design interview from scratch, covering: