System Design
System design interview prep — fresher to architect
Twelve modules from interview frameworks to cloud-native production. StreamHub grows with every chapter — one platform, every building block, every classic product design.
The System Design Interview Framework
A four-step structure that keeps every answer clear, scoped and interview-ready from the first minute.
Functional vs Non-Functional Requirements
Separate what the system must do from how well it must do it — latency, scale, consistency and cost.
Back-of-the-Envelope Estimation
Turn DAU and payload sizes into QPS, storage and server counts using numbers you can do in your head.
Trade-offs and Common Mistakes
How to compare design options honestly and avoid the traps that sink most interview answers.
Performance vs Scalability
Why a fast system on one machine is not the same as a system that survives ten million users.
Vertical vs Horizontal Scaling
Scale up, scale out, and know when each approach stops working.
Zero to Millions of Users
Follow StreamHub from one server to CDN, cache, queues and sharded databases as traffic grows.
DNS Fundamentals
How a domain name becomes an IP address and why DNS matters at every layer of scale.
Network Protocols
TCP, UDP, HTTP and TLS — the transport stack every distributed system sits on.