System Design Fundamentals
You can read a system diagram and you cannot draw one yet. Learn the load balancers, caches, databases, and queues piece by piece, so the building blocks finally make sense.
System Design Interview Prep
You freeze when the interviewer says design Twitter. Learn the structure, clarifying questions, and out-loud reasoning that turns the system design loop from a guessing game into a script.
Scaling Real Systems
Tutorials show monoliths and case studies show finished diagrams. Walk through the actual jumps from monolith to multi-region, so you understand which trade-offs decided each step.
Low-Latency Systems
You work in a place where ten milliseconds is revenue. Learn the caching, async, and architectural choices that move tail latency, not just average latency.
Multi-Tenant Architecture
Your SaaS works fine until a noisy customer takes everyone else down. Learn the isolation models and tenancy patterns that real SaaS companies use to keep tenants apart.