PKPRINCE KUMARinprincekumar-engineer.hashnode.dev·1d ago · 27 min readKafka Explained Like You're 5: Events, Partitions, and Consumer GroupsHow does a large application process millions of events every day? Think about a food delivery app. Every minute, thousands of things are happening: Someone creates an account. Someone places an ord00
PKPRINCE KUMARinprincekumar-engineer.hashnode.dev·1d ago · 28 min readBuilding Scalable Systems: Caching, Rate Limiting and ObservabilityWhat happens when your application suddenly gets 1 million users? At small scale, a web application can look deceptively simple: User → Application → Database → Response As traffic grows, however, ev00
PKPRINCE KUMARinprincekumar-engineer.hashnode.dev·1d ago · 22 min readRealtime Systems: Polling, WebSocket, SSE, and Pub/SubHow does WhatsApp deliver a message instantly? You send a message to a friend. Within a fraction of a second, their phone shows a notification. There is no refresh button. You do not repeatedly ask t00
PKPRINCE KUMARinprincekumar-engineer.hashnode.dev·Aug 25 · 24 min readModern Next.js: Routing, Layouts, Server Components, API Routes & Server ActionsCan a React application have both frontend and backend inside the same project? With modern Next.js, the answer is yes. Next.js has evolved from a React framework primarily focused on server-rendered 00
PKPRINCE KUMARinprincekumar-engineer.hashnode.dev·Aug 25 · 17 min readNext.js Explained: Why It Became the Default React FrameworkIf React is so popular, why was Next.js created? React changed how developers build user interfaces by making component based development simple and reusable. But as React applications grew, develope00
