System Design Mastery

Your complete roadmap to master Low Level Design (LLD) & High Level Design (HLD)

Your Learning Progress

Ready to start your journey!

🎯

Phase 1: Fundamentals

Duration: 3-4 weeks

Object-Oriented Programming

  • Classes and Objects
  • Inheritance & Polymorphism
  • Encapsulation & Abstraction
  • Composition vs Inheritance

Design Principles

  • SOLID Principles
  • DRY, KISS, YAGNI
  • Separation of Concerns
  • Law of Demeter

UML Diagrams

  • Class Diagrams
  • Sequence Diagrams
  • Activity Diagrams
  • Use Case Diagrams
⚙️

Phase 2: Design Patterns

Duration: 4-5 weeks

Creational Patterns

  • Singleton Pattern
  • Factory Method
  • Abstract Factory
  • Builder Pattern
  • Prototype Pattern

Structural Patterns

  • Adapter Pattern
  • Decorator Pattern
  • Facade Pattern
  • Composite Pattern
  • Proxy Pattern

Behavioral Patterns

  • Observer Pattern
  • Strategy Pattern
  • Command Pattern
  • State Pattern
  • Chain of Responsibility
🏗️

Phase 3: System Components

Duration: 5-6 weeks

Data Structures & Algorithms

  • Time & Space Complexity
  • Hash Tables & Trees
  • Graphs & Heaps
  • Searching & Sorting

Database Design

  • ER Diagrams
  • Normalization
  • ACID Properties
  • Indexing Strategies

API Design

  • RESTful Services
  • API Versioning
  • Authentication
  • Rate Limiting
🚀

Phase 4: Real-world Projects

Duration: 6-8 weeks

Practice Problems

  • Design a Parking Lot
  • Design an ATM System
  • Design a Library Management
  • Design a Tic-Tac-Toe Game

Advanced Projects

  • Design a Chat Application
  • Design an Online Auction
  • Design a File System
  • Design a Chess Game

Code Reviews & Refactoring

  • Code Quality Metrics
  • Refactoring Techniques
  • Performance Optimization
  • Testing Strategies
🌐

Phase 1: System Architecture Basics

Duration: 4-5 weeks

Distributed Systems

  • Client-Server Architecture
  • Peer-to-Peer Systems
  • Microservices vs Monolith
  • Service-Oriented Architecture

Scalability Concepts

  • Horizontal vs Vertical Scaling
  • Load Balancing
  • Auto-scaling
  • Performance Metrics

System Design Fundamentals

  • Requirements Analysis
  • Capacity Planning
  • Back-of-envelope Estimation
  • Trade-offs Analysis
🔧

Phase 2: Core Components

Duration: 5-6 weeks

Data Storage

  • SQL vs NoSQL Databases
  • Database Sharding
  • Replication Strategies
  • ACID vs BASE

Caching Systems

  • Cache Patterns
  • Redis & Memcached
  • CDN (Content Delivery Network)
  • Cache Invalidation

Message Queues

  • Pub/Sub Pattern
  • Apache Kafka
  • RabbitMQ
  • Event-Driven Architecture
⚡

Phase 3: Advanced Concepts

Duration: 6-7 weeks

Consistency & Availability

  • CAP Theorem
  • Eventual Consistency
  • Consensus Algorithms
  • Distributed Transactions

System Reliability

  • Fault Tolerance
  • Circuit Breaker Pattern
  • Disaster Recovery
  • Monitoring & Alerting

Security & Performance

  • Authentication & Authorization
  • API Security
  • Performance Optimization
  • Latency & Throughput
🏆

Phase 4: Large-Scale Systems

Duration: 8-10 weeks

Design Popular Systems

  • Design WhatsApp/Slack
  • Design Instagram/Twitter
  • Design Netflix/YouTube
  • Design Uber/Lyft

Complex Systems

  • Design Google Search
  • Design Amazon/E-commerce
  • Design Banking System
  • Design IoT Platform

Interview Preparation

  • System Design Interview
  • Architecture Decision Records
  • Technical Communication
  • Real-world Case Studies
🎯

Month 1-2: Foundation Building

Build strong fundamentals in both domains

Week 1-2: OOP & Design Principles

  • Master SOLID principles
  • Practice OOP concepts
  • Learn UML basics
  • Understand design trade-offs

Week 3-4: System Architecture Basics

  • Client-server fundamentals
  • Scalability concepts
  • Basic distributed systems
  • Requirements analysis

Week 5-8: Design Patterns

  • Creational patterns
  • Structural patterns
  • Behavioral patterns
  • Pattern selection criteria
⚙️

Month 3-4: Component Design

Learn to design system components

Database & Storage

  • Database design (LLD)
  • SQL vs NoSQL (HLD)
  • Sharding & replication
  • Data modeling

API & Communication

  • RESTful API design
  • Message queues
  • Inter-service communication
  • Protocol selection

Caching & Performance

  • Cache design patterns
  • CDN strategies
  • Performance optimization
  • Load balancing
🏗️

Month 5-6: Advanced Integration

Combine LLD and HLD concepts

System Reliability

  • Fault tolerance design
  • Circuit breaker implementation
  • Error handling strategies
  • Monitoring & observability

Consistency & Transactions

  • ACID implementation
  • Distributed consensus
  • CAP theorem applications
  • Transaction design patterns

Security Integration

  • Authentication mechanisms
  • Authorization patterns
  • Data encryption
  • Security by design
🚀

Month 7-8: Master Projects

Build complete systems end-to-end

E-commerce Platform

  • User management (LLD)
  • Catalog service design
  • Payment system architecture
  • Order processing pipeline

Social Media Platform

  • Feed generation algorithms
  • Content delivery system
  • Real-time messaging
  • Notification system

Streaming Platform

  • Video processing pipeline
  • Content recommendation
  • Global content delivery
  • Analytics & metrics

📚 Essential Resources

Books
Design Patterns: Elements of Reusable Object-Oriented Software Online Courses
System Design Interview Course Practice Platforms
LeetCode System Design Documentation
AWS Architecture Center Communities
System Design Primer GitHub Videos
YouTube System Design Channels

🎯 Pro Tips for Success