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KSKanishka Shashihtml-dev09.hashnode.dev3d ago · 11 min read

Kafka Explained Like You're 5: Events, Partitions, and Consumer Groups

Introduction How does a large application process millions of events every day? Imagine a food delivery app during dinner time. Thousands of customers are placing orders, restaurants are accepting the

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KSKanishka Shashinodej.hashnode.dev3d ago · 11 min read

React Hooks Masterclass: useState, useEffect, and Custom Hooks

Introduction How does React remember information between renders? Imagine clicking a button that increases a counter. The component function runs again after every click, yet React somehow remembers t

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KSKanishka Shashihtml-dev09.hashnode.dev3d ago · 19 min read

Next.js Explained: Why It Became the Default React Framework

The question that started it all If React is so popular, why was Next.js created? React solved a real problem: building complex, interactive user interfaces out of small, reusable, declarative compone

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KSKanishka Shashinodej.hashnode.dev5d ago · 19 min read

React Fundamentals: Components, JSX, State, and Re-rendering

The question that started it all Why did developers create React when JavaScript already existed? JavaScript could already change a web page after it loaded — you could grab an element with document.g

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KSKanishka Shashihtml-dev09.hashnode.dev6d ago · 25 min read

Modern Next.js: Routing, Layouts, Server Components, API Routes & Server Actions

The question that started it all Can a React application have both frontend and backend inside the same project? For most of React's history, the honest answer was "not really, not cleanly." A typical

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KSKanishka Shashinodej.hashnode.dev6d ago · 11 min read

State Management in React: Context API, Prop Drilling, React.memo, useMemo, and useCallback

Why Does Managing State Become Difficult as Applications Grow? Imagine you're building a simple React application. It starts with just a few components—a login page, a navigation bar, and a dashboard.

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KSKanishka Shashinodej.hashnode.dev6d ago · 11 min read

Building Scalable Systems: Caching, Rate Limiting, and Observability

What Happens When Your Application Suddenly Gets One Million Users? Imagine this. You launch a new product after months of development. Marketing campaigns go live, influencers start talking about it,

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KSKanishka Shashihtml-dev09.hashnode.dev6d ago · 17 min read

Realtime Systems: Polling, WebSockets, SSE, and Pub/Sub

The question that started it all How does WhatsApp deliver a message instantly? You send a message, and it appears on your friend's phone within a fraction of a second — no refresh button, no waiting.

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KSKanishka Shashinodej.hashnode.devJul 2 · 8 min read

Securing Apps: Password Hashing, RBAC, OAuth, and OpenID Connect

Security is one of those things that's easy to bolt on badly and hard to retrofit well. Most applications end up needing to answer four separate questions: How do we store credentials safely? How do w

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ABAryan Bhaskararyanbhaskr4.hashnode.devJun 30 · 5 min read

Let's Understand LLM (GPT) Working Mechanism | It's Not Just Googling, It's Beyond

When you type a prompt into ChatGPT(Generative Pretrained Transformer), it doesn't just run a quick Google search, copy some text from a webpage, and paste it back to you. It is doing something far de

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#cohort2026

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Trending tags this week

Kafka Explained Like You're 5: Events, Partitions, and Consumer Groups

React Hooks Masterclass: useState, useEffect, and Custom Hooks

Next.js Explained: Why It Became the Default React Framework

React Fundamentals: Components, JSX, State, and Re-rendering

Modern Next.js: Routing, Layouts, Server Components, API Routes & Server Actions

State Management in React: Context API, Prop Drilling, React.memo, useMemo, and useCallback

Building Scalable Systems: Caching, Rate Limiting, and Observability

Realtime Systems: Polling, WebSockets, SSE, and Pub/Sub

Securing Apps: Password Hashing, RBAC, OAuth, and OpenID Connect

Let's Understand LLM (GPT) Working Mechanism | It's Not Just Googling, It's Beyond