The LLD & Patterns Architecture Map

From SOLID principles and Clean Code fundamentals to Gang of Four (GoF) Creational, Structural, and Behavioral patterns and Machine Coding case studies.

TRACK_01

SOLID Principles & Clean Architecture

Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, Dependency Inversion.

1 topics

Foundations / 01

The SOLID Principles of Object-Oriented Design

The five architectural pillars (SRP, OCP, LSP, ISP, DIP) that transform brittle spaghetti code into flexible, decoupled class hierarchies.

starterDeep dive

TRACK_02

Creational Patterns

Factory Method, Abstract Factory, Builder with fluent chaining, Singleton, and Prototype.

1 topics

Creational / 01

Creational Patterns: Factory Method, Builder & Singleton

Decoupling object instantiation mechanisms from consuming clients using Factory Method, Abstract Factory, and fluent Builders.

intermediateDeep dive

TRACK_03

Structural Patterns

Adapter for interface translation, Decorator for dynamic behavior wrapping, and Facade gateways.

1 topics

Structural / 01

Structural Patterns: Adapter, Decorator & Facade

Composing objects into larger structures using Adapters for incompatible interfaces, Decorators for dynamic behavior wrapping, and Facades for simplified APIs.

intermediateDeep dive

TRACK_04

Behavioral Patterns

Strategy for dynamic algorithms, State machines, Observer pub/sub, and Command history.

1 topics

Behavioral / 01

Behavioral Patterns: Strategy, Observer, State & Command

Managing runtime algorithm switching (Strategy), pub/sub event broadcasting (Observer), and state-dependent class behavior (State).

advancedDeep dive

TRACK_05

LLD Machine Coding Case Studies

Smart Multi-Floor Parking Lot, Elevator System, Rate Limiter, and Notification Dispatcher.

1 topics

Case Study / 01

Machine Coding Case Study: Smart Parking Lot & Elevator

End-to-end Low-Level Design of a multi-floor Parking Lot and Elevator scheduling system using Clean Architecture and Design Patterns.

expertDeep dive

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