Overview

System design is the fundamental backbone of modern softwareensuring reliability under heavy pressure. This book serves as your essential guide to turning basic code into resilient, professional-grade distributed systems that power today's digital world. This book systematically leads you through core scalability principles, comparing vertical and horizontal scaling while optimizing performance through latency and throughput metrics. You will master database design by exploring SQL, NoSQL, and sharding strategies. This book provides the details of microservices using REST, gRPC, and GraphQL, alongside critical security protocols like OAuth and JWT to protect your infrastructure. You then apply these components to build real-world projects, including WhatsApp-style chat systems, URL shorteners, and scalable notification engines, before concluding with production best practices, monitoring, and AI trends. By the end of this book, you will possess the technical confidence to architect high-concurrency applications and ace system design interviews. You will be fully equipped to design, secure, and scale enterprise-level solutions that handle millions of users with ease. What you will learn ● Understand core principles behind scalable, distributed system architectures. ● Design APIs, databases, caches, and message-driven components. ● Apply system design to real-world problems and case studies. ● Build reliable, fault-tolerant, high-performance production systems. ● Evaluate trade-offs and make confident architectural decisions. Who this book is for This book is for software engineers, architects, and engineering managers building large-scale systems. It is ideal for interview preparation or leadership transitions. Readers should have basic programming knowledge and a fundamental understanding of how web servers and databases interact. Table of Contents 1. Introduction to System Design 2. Scalability and Performance Basics 3. Database Design for Scalable Systems 4. Load Balancing and Traffic Distribution 5. Message Queues and Event-driven Architecture 6. API Design and Microservices Architecture 7. Caching 8. Security in System Design 9. Designing a Real-time Chat System 10. Designing a URL Shortener 11. Designing a Notification System 12. Building Scalable Systems in Production Final Thoughts

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