I designed this guide to support others on their journey to mastering system design interviews while reinforcing my own knowledge—because teaching is one of the most powerful ways to learn.

If you have questions, suggestions, or think I’ve missed something critical, don’t hesitate to reach out. I’d love to hear your thoughts and continue improving together!

Scalability and Load Balancing
Vertical vs. Horizontal scaling

Vertical vs. Horizontal scaling
Load balancing techniques
Proxy servers and reverse proxies

Data Modeling

Relational (SQL) vs. NoSQL
Schema design for read/write optimization
Normalization vs. Denormalization

Distributed Systems

In-memory caching and eviction policies
Write-through vs. write-back caching
CDN usage for static assets

Indexing

B-Tree and LSM-Tree indices
Secondary indices
Full-text search engines

Message Queues and Event-Driven Architectures

Producer-consumer models
At-least-once vs. exactly-once delivery
Pub/Sub systems

Consistency Models

Strong consistency vs. eventual consistency
Read-after-write, read-your-own-write
Conflict resolution strategies (e.g., CRDTs)

System Design In A Hurry

Scalability and Load BalancingVertical vs. Horizontal scaling

Vertical vs. Horizontal scalingLoad balancing techniques Proxy servers and reverse proxies