Day 1

Databases

Day 2

Database Scaling

Day 3

Load Balancing

Day 4

Horizontal vs Vertical Scaling

Day 5

CDN & Content Delivery

Day 6

API Gateway

Day 7

Microservices Architecture

Day 8

Monolith vs Microservices

Day 9

Message Queues

Day 10

Event-Driven Architecture

Day 11

Sharding

Day 12

Replication

Day 13

CAP Theorem

Day 14

Distributed Systems Basics

Day 15

Rate Limiting

Day 16

Authentication & Authorization

Day 17

OAuth & JWT

Day 18

Monitoring & Logging

Day 19

CI/CD Pipelines

Day 20

Fault Tolerance

Day 21

Circuit Breaker Pattern

Day 22

Data Consistency Models

Day 23

Search Systems

Day 24

Real-Time Systems

Day 25

Designing Chat Systems

Day 26

Designing Payment Systems

Day 27

Designing Social Media Feeds

Day 28

High Availability Systems

Day 29

Scalable File Storage

Day 30

End-to-End System Design