📐 System Design Repository

Welcome to my System Design Repository – a structured guide covering everything from foundations to Low-Level Design (LLD), High-Level Design (HLD), and advanced concepts.

This repo is built to help developers (including myself) master system design step by step, preparing for FAANG interviews, scalable architecture discussions, and real-world engineering.

📚 Contents

1. Foundations

• Basics of System Design

• Client-Server Model

• Networking Essentials (HTTP, TCP, DNS, etc.)

• Caching Fundamentals

• Load Balancing Basics

• Database Concepts (SQL vs NoSQL, Sharding, Replication, Indexing)

2. Low-Level Design (LLD)

• Object-Oriented Design Principles (SOLID, DRY, etc.)

• Design Patterns (Factory, Singleton, Observer, Strategy, etc.)

• UML Diagrams (Class, Sequence, Activity)

• LLD Case Studies (Parking Lot, Splitwise, Elevator, etc.)

3. High-Level Design (HLD)

• Scalability Principles

• CAP Theorem & Consistency Models

• Microservices vs Monoliths

• Message Queues (Kafka, RabbitMQ)

• Caching Strategies (Redis, Memcached)

• HLD Case Studies (Twitter, Netflix, WhatsApp, Uber, Instagram, etc.)

4. Advanced Topics

• Distributed Systems Deep Dive

• Consensus Algorithms (Raft, Paxos)

• Event-Driven Architectures

• API Gateways & Rate Limiting

• CDNs & Edge Computing

• Real-world trade-offs and design decisions

🚀 Why this Repo?

• Structured Learning Path – from beginner to advanced

• Interview Prep – covers both LLD and HLD, aligned with FAANG-style questions

• Real-World Systems – practical insights into designing scalable products

• Reference Hub – a go-to place for quick revision before interviews or projects

🛠️ How to Use This Repo

• Start with Foundations if you’re new to system design

• Move to LLD for object-oriented design practice

• Explore HLD for large-scale distributed system concepts

• Dive into Advanced when you’re comfortable with fundamentals

📖 Recommended Resources

• System Design Interview by Alex Xu (Vol 1 & 2)

• System Design LLD (by Coder Army)

• Designing Data-Intensive Applications by Martin Kleppmann

• Grokking the System Design Interview (educative.io)

• High Scalability Blog

🤝 Contributions

This repo is constantly evolving. Contributions, corrections, or additional case studies are welcome!

⭐ Support

If you find this useful, consider starring the repo ⭐ to support the work.