📄️ Networking Foundations
Every like, search, and payment is just bytes crossing a network. Master the six ideas that decide whether those bytes arrive fast, safe, and at the right door.
📄️ APIs & Communication
Once machines can reach each other, they need a contract. REST, GraphQL, WebSockets, and Webhooks are four answers to one question: how should two pieces of software talk?
📄️ Data Storage
APIs move data around — but where does it live, and how do you get it back fast? Database types, indexing, partitioning, caching, denormalization, and blob storage, decoded.
📄️ Scaling
One server can't hold the line forever. The two ways to grow — up and out — plus the load balancers, replicas, and shards that make growing out actually work.
📄️ Distributed Systems
The moment you run more than one machine, easy things get hard. The CAP theorem, CDNs, idempotency, and disciplined retries are the ideas that keep distributed systems honest.
📄️ Architecture Patterns
With every building block in hand, the last question is how to arrange them. Microservices, message queues, rate limiting, and API gateways are the blueprints for systems that grow.