System Design
A beginner-friendly System Design course: we start from zero and explain every term in plain words — how big websites and apps serve huge numbers of users without falling over. Step by step we cover requirements, sizing, databases, caching, queues, reliability, and security, with everyday analogies and interview practice. No prior experience needed.
- Lesson 0: Why Design a System's Scale Ahead of Time?
- System Design Interview Playbook
- Scaling Foundations: Latency, Throughput, SLOs
- Networking, DNS, Load Balancing, API Gateway
- Storage: SQL, NoSQL, Indexes, Sharding
- Caching and CDN
- Queues, Streams, and Async Processing
- Consistency, Replication, and CAP
- Reliability: Failures, Rate Limiting, Observability
- Security, Privacy, and Multi-tenancy
- Design Deep Dive: URL Shortener + Pastebin
- Design Deep Dive: Chat, Notifications, and Feed
- Mock Interview: Senior-Level Answer Framework
