HLD & LLD Mastery
Bridge the gap between architecture diagrams and implementation details.
A design curriculum that teaches you how to move from broad architecture to clean objects, boundaries, patterns, and class-level decisions.
Designed for
Engineers preparing for LLD rounds or leveling up their software design depth.
What you unlock
- Cleaner reasoning around SOLID, patterns, responsibilities, and schema design
- A usable bridge between HLD whiteboard thinking and concrete Java classes
- Case-study practice across common interview-style design systems
Curriculum Map
A structured path that feels worth paying for
Every module is ordered to build confidence, not just collect content. Start with the right fundamentals, deepen into the mechanics, then pressure-test your thinking with realistic engineering trade-offs.
Module 1
2. Design Patterns
LLD Masterclass Module 2: Design Patterns in Production
Intermediate • 7 min read
LLD Lesson: The Strategy Pattern
Intermediate • 7 min read
LLD Lesson: The Factory Pattern
Intermediate • 7 min read
LLD Masterclass: The Observer Pattern in Production Systems
Intermediate • 6 min read
LLD Lesson: The Decorator Pattern
Intermediate • 7 min read
LLD Design Patterns: Curated Practice Problems
Medium • 6 min read
Module 2
3. Schema & Persistence
Module 3
4. Advanced Patterns
Module 4
Case Studies (LLD)
Module 5
HLD Case Studies
Case Study: Design a URL Shortener (TinyURL/Bitly)
Intermediate • 5 min read
System Design: Designing WhatsApp (Real-time Messaging at Scale)
Advanced • 4 min read
Project Case Study: Designing YouTube (Video Streaming at Global Scale)
Advanced • 5 min read
Case Study: Design Uber (Ride-Hailing at Global Scale)
Advanced • 5 min read
Case Study: Design a Payment System (Stripe/UPI)
Advanced • 7 min read
Module 6
LLD Case Studies
Module 7
Phase 1: High-Level Design
Introduction to High-Level Design
Intermediate • 3 min read
System Design Module 1: Introduction to Distributed Systems
Beginner • 8 min read
System Design Module 3: Scalability Basics (Vertical vs Horizontal)
Beginner • 7 min read
What is Load Balancing? A Simple Guide for Backend Engineers
Beginner • 8 min read
Database Indexing Deep Dive: B-Trees, Hash Indexes, and Query Planning
Advanced • 9 min read
System Design: Designing a Distributed Cache (Redis)
Intermediate • 8 min read
System Design: Designing a Distributed Message Queue (Kafka)
Advanced • 8 min read
Module 8
Phase 2: Low-Level Design
LLD Masterclass Module 1: Foundational LLD & SOLID Principles
Intermediate • 7 min read
The Senior Engineer Guide to LLD: SOLID Principles in Practice
Intermediate • 6 min read
LLD Mastery: The Singleton Design Pattern
Intermediate • 8 min read
LLD Mastery: The Factory Design Pattern
Intermediate • 8 min read
LLD Mastery: The Strategy Design Pattern
Intermediate • 8 min read
Module 9