Learning Path - Low Level Design Mastery

Module 01

OOPS Refresher

The Foundation

Revisit core Object-Oriented principles to ensure your foundation is rock solid. We cover encapsulation, polymorphism, and class relationships.

Class & Objects

Encapsulation & Access Modifiers

Inheritance & Polymorphism

Abstract Classes & Interfaces

Composition vs Inheritance

Module 02

Optional

Advanced Python

Optional for Python Devs

Master Python's advanced features to write idiomatic, efficient code. Crucial for translating design patterns into cleaner implementations.

Type Hints & Annotations

Decorators & Context Managers

Dunder (Magic) Methods

Iterators & Generators

Concurrency (Asyncio/Threading)

Module 03

SOLID Principles

Architecture Rules

Learn the 5 golden rules of maintainable software design. We dissect each principle with real-world 'bad' vs 'good' code examples.

Single Responsibility (SRP)

Open/Closed (OCP)

Liskov Substitution (LSP)

Interface Segregation (ISP)

Dependency Inversion (DIP)

Module 04

Design Patterns

Standard Solutions

Don't reinvent the wheel. We cover the most important Gang of Four patterns used in modern backend systems.

Creational: Factory, Singleton, Builder

Structural: Adapter, Decorator, Facade

Behavioral: Observer, Strategy, State

Thread-safe Implementations

Module 05

LLD Case Studies

System Design

Apply everything you've learned to build complex systems from scratch. We handle requirements, schema design, and code structure.

Design a Parking Lot

Design Splitwise

Design Movie Ticket Booking

Design a Cache / Rate Limiter

Concurrency Handling

Module 06

Interview Focus

Career Prep

Targeted preparation for the machine coding round. Learn how to gather requirements, manage time, and communicate your design.

Requirement Gathering Strategy

Class Diagram Speed-Run

Schema Design (SQL vs NoSQL)

Handling Ambiguity

Mock Interview Questions

LLD Expert

You are ready to crack any LLD interview.