Your Learning Journey

305 Topics across HLD & LLD — from Beginner to Interview-ready

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Topics Finished

0% of Total305 Remaining

Total Topics

305

Across HLD & LLD

247 HLD · 58 LLDFull Library

XP Earned

Points This Journey

500 XP to Next LevelIntern level

Full Curriculum

START HERE · HLD

HLD Foundations

Start here — learn the basics of system design

HTTPAPIsDNSDatabasesCaching

50+ topics · ~15h

OOP + SOLID · LLD

LLD Foundations

Object-oriented design & clean code

OOP conceptsSOLID principlesClass RelationshipsUML Diagrams

25 topics · ~8h

CORE · HLD

HLD Core Concepts

Master the skills every system designer needs

Load balancingShardingMessage QueuesCAP TheoremConsistency Patterns

100+ topics · ~25h

PATTERNS

Design Patterns

Reusable solutions to common problems

FactoryObserverStrategySingletonDecorator

10+ patterns · ~6h

ADVANCED · HLD

HLD Advanced + Practice

Senior/staff level depth + real system designs

Distributed SystemsEvent SourcingDesign TwitterUberNetflix

80+ topics · ~20h

INTERVIEW READY · LLD

LLD Interview Problems

Design real systems from scratch — code level

Parking LotElevatorChessAmazonChat App

20+ problems · ~15h

Start HLD Start LLD

Start your journey!

0/198 topics

LLM

0/9

Web RTC

0/4

RAG

0/4

Object Oriented Design

0/4

Distributed Systems

0/4

Concurrency

0/3

Web Socket

0/2

Real Time Collaboration

0/2

Choose Your Path

Interview Sprint

Tips + Top Problems

1 week📚 20 topics

POPULAR

Speed Run

50 Essential Topics

2 weeks📚 30 topics

Complete Mastery

Full Curriculum

2 months📚 150 topics

View All Sprints →

Daily VibeThursday, Apr 16

“The first Google server was built with LEGO bricks. Now they have 30+ data centers.”

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