Haroon Nafees’ Post

Why I stopped putting API calls inside my React components (and what I do instead) Let’s be real: when you’re first learning React, it’s tempting to just throw a fetch() inside a useEffect and call it a day. It works! But then your app grows.📈 Suddenly, you’re prop-drilling data five levels deep, your components are 500 lines long, and fixing one small bug feels like playing Jenga. I’ve started moving toward a 4-Layer Architecture, and honestly, it’s like giving your codebase a deep breath of fresh air. Here’s how I break it down: 1️⃣ The UI Layer: This is the "face." It only cares about JSX and CSS. No complex logic, no fetching. Just: "Here is a button, tell me what to show." 2️⃣ The Hook Layer: This is the "brain." It handles the logic. It talks to the state and the API and gives the UI exactly what it needs (like isLoading or data). 3️⃣ The Context Layer: The "memory." This is our single source of truth for things like Auth or Themes, so we don't have to pass props through 10 components. 4️⃣ The API Layer: The "messenger." It handles the dirty work—headers, base URLs, and error handling. If the backend changes, I only change code here. The result? ✅ Faster debugging (you know exactly where to look). ✅ Easier testing. ✅ A UI that doesn't break just because a backend dev changed a key name. It’s about building something that’s easy to maintain six months from now, not just something that works today. Detailed Tech Notes : https://lnkd.in/gSDP2h8f How are you guys structuring your frontend lately? Any patterns you're loving? Let's chat in the comments! 👇 #ReactJS #WebDevelopment #CleanCode #SoftwareArchitecture #Frontend #ProgrammingTips

🚀 Understanding the Node.js System Architecture Ever wondered what actually happens behind the scenes when your Node.js app runs? This diagram breaks down the complete Node.js system flow: 🔹 Application Layer (JavaScript + V8 Engine) Your JS code runs on Google’s powerful V8 engine. 🔹 Node.js Bindings (C/C++) Acts as a bridge between JavaScript and native system operations. 🔹 Libuv Handles asynchronous I/O operations, thread pooling, and event management. 🔹 Event Loop The heart of Node.js — processes callbacks, manages non-blocking operations, and ensures high performance. 🔹 Worker Threads Handles CPU-intensive tasks without blocking the main thread. 💡 This architecture is what makes Node.js fast, scalable, and perfect for real-time applications like chats, APIs, and streaming platforms. Mastering this flow helps you: ✅ Write more efficient backend code ✅ Debug performance issues ✅ Build truly scalable systems If you're working with backend systems, understanding the event loop is a game changer. #NodeJS #BackendDevelopment #JavaScript #WebDevelopment #SoftwareEngineering #EventLoop #FullStackDeveloper #SystemDesign #TechLearning #AI

⚛️ 3 Common Mistakes Developers Make That Hurt React Performance While building React applications, I’ve noticed that performance issues often come from small architectural decisions rather than the framework itself. Here are three common mistakes developers make: 1️⃣ Unnecessary Re-renders Many components re-render more often than needed. This usually happens when state is lifted too high or when functions and objects are recreated on every render. ✔️ Using techniques like React.memo, useCallback, and useMemo can significantly reduce unnecessary renders. 2️⃣ Fetching Data Inefficiently Fetching data directly inside multiple components can cause duplicate API calls and slow down the application. ✔️ Using centralized data fetching, caching strategies, or tools like React Query can improve both performance and scalability. 3️⃣ Large Components Doing Too Much When a single component handles too many responsibilities, it becomes harder to optimize and maintain. ✔️ Breaking UI into smaller reusable components improves performance and keeps the codebase cleaner. Performance optimization in React is rarely about complex tricks — it’s usually about writing clean, predictable, and well-structured components. What React performance issue have you faced recently? #ReactJS #FrontendDevelopment #WebPerformance #JavaScript #SoftwareEngineering

In React, performance issues are often invisible. One common mistake in real-world applications isn’t complex logic — it’s unnecessary re-renders. When parent components update, child components may re-render even if their data hasn’t changed. Over time, this can quietly impact performance in larger applications. Using tools like useCallback, React.memo, and proper state placement helps control render cycles and keep components predictable. React doesn’t automatically optimize every render — and understanding when components update is a key part of writing scalable frontend code. Small architectural decisions early can prevent performance bottlenecks later. #ReactJS #FrontendDevelopment #PerformanceOptimization #SoftwareEngineering #FullStackDevelopment #LearningInPublic

Just shipped something cool. 🔥 Built a real-time chat app where rooms are created using IP addresses as room codes — no sign-up, no database, no friction. Two people. Same Room Code (can be anything). Instant private chat room. That's it. ⚙️ Tech Stack: → Node.js + Express → Socket.IO for real-time events → Vanilla JS frontend (no frameworks) → Deployed on Render 🧠 What I learned building this: → How WebSockets work under the hood → Why Socket.IO falls back to HTTP polling on some cloud providers → How to debug live deployment issues using server logs → How CORS and MIME types can silently break your entire app Theory is great. But shipping a real project and debugging it in production? That's where you actually level up. 📈 🔗 Live demo: https://lnkd.in/gyJATDrE #JavaScript #NodeJS #SocketIO #FullStackDevelopment #WebDevelopment #Coding #BuildInPublic #SoftwareEngineering #TechTwitter #Programming #Developer #OpenSource #100DaysOfCode #CareerInTech #LearningByDoing

Most developers think in components. Senior developers think in systems. A component solves a UI problem. A system solves a business problem. When you start thinking in systems, you begin asking different questions: • Where does state truly belong? • What is the data flow across the app? • How does this scale in 6 months? • What breaks when the team grows? React isn’t just about building reusable pieces. It’s about designing predictable architectures. The shift from “How do I build this component?” to “How does this fit into the whole system?” That’s the real senior transition. What was the moment you realized React was more about architecture than JSX? #ReactJS #JavaScript #FrontendArchitecture #SystemDesign #SoftwareEngineering #FrontendDevelopment #TechGrowth #FullStackDeveloper

Knowing JavaScript, React, Redux, and Backend is normal. But building something that survives production? That’s rare. You can build UI with React. You can manage state with Redux Toolkit. You can write APIs with Node.js and Express.js. But real engineering starts when: • Your API doesn’t crash under load • Your state doesn’t break on edge cases • Your authentication system handles refresh tokens securely • Your folder structure supports scale • Your logs help debug real production issues Development is not about making it work. It’s about making it: . Maintainable . Secure . Scalable . Understandable by other developers Frontend shows features. Backend protects logic. Architecture protects the future. If you’re building full stack apps think beyond CRUD. Think systems. Think scale. Think long term. #JavaScript #React #Redux #Backend #FullStack #SoftwareEngineering #WebDevelopment

Most developers learn React in pieces. First — Components. Then — Hooks. Then — State Management. But the real power of React isn’t learning them separately. It’s understanding how they work together. 🧩 Components are your building blocks. They define structure and responsibility. ⚙️ Hooks give components life. They let you manage logic, side effects, and behavior. 🔄 State Management controls data flow. It decides how information moves between components. When you truly understand these three things: • We stop building messy apps. • We start designing clean architecture. • Our code becomes predictable. • Debugging becomes easier. React isn’t about writing more code. It’s about building smarter components, managing state clearly, and keeping logic reusable. Master these three — and React starts feeling simple. Just sharing a thought. #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #Coding #Developers

Headline: Stop over-engineering your React state. 🛑 "Which state management library should we use?" It’s the first question every React team asks, and usually, the answer is "Redux" by default. But in 2026, the "default" is dangerous. Choosing the wrong tool leads to boilerplate nightmares or massive performance bottlenecks. After breaking (and fixing) a few production apps, here is my "Cheat Sheet" for 2026: 1. React Context API 🧊 Best for: Low-frequency updates. Use it for: UI Themes (Dark/Light), User Authentication status, or Localization (Language). The Trap: Don’t use it for high-frequency state (like a text input or a game loop). Every time a value in Context changes, every component consuming it re-renders. 2. Zustand 🐻 Best for: Most modern SPAs. Use it for: Global state that needs to be fast and simple. It’s unopinionated, has zero boilerplate, and handles transient state updates beautifully. Why I love it: You can grab exactly what you need with selectors, preventing those dreaded unnecessary re-renders. 3. Redux (Toolkit) 🏢 Best for: Large-scale enterprise apps with complex data flows. Use it for: Apps where you need a strict "source of truth," powerful debugging (Redux DevTools), or highly predictable state transitions across a massive team. The Reality: If you aren't using the "undo/redo" logic or complex middleware, you might be carrying extra weight you don't need. The Verdict? Small/Medium:- Context + Local State. Growth/Scale:- Zustand. Complex/Enterprise:- Redux Toolkit. The best developers don't have a favorite tool; they have a favorite solution for the specific problem at hand. 🧠 What’s your go-to in 2026? Are you team "Zustand for everything" or a Redux traditionalist? Let's argue (politely) in the comments! 👇 #ReactJS #WebDevelopment #Zustand #Redux #JavaScript #SoftwareArchitecture #CodingTips

Most TypeScript codebases don’t fail because of “bad types” — they fail because the types can’t scale. 🧠⚙️ When your React/Next.js or Node.js app hits 50+ modules, the winning move is leaning on utility types to encode rules once and reuse them everywhere. ✅ A few patterns that keep large apps sane: 1) Safer APIs with inference Use ReturnType/Parameters to keep controllers, services, and SDK wrappers in sync. If a function changes, the compiler forces the refactor. 🔒 2) Intentional write vs read models Create DTOs with Pick/Omit + Partial/Required. Example: “create user” shouldn’t accept id/createdAt, “update user” shouldn’t require email. This prevents accidental overposting bugs. 🛡️ 3) Make invalid states unrepresentable Discriminated unions + Extract/Exclude for workflows: HR onboarding, healthcare eligibility, energy asset status… each step becomes a typed state machine. Fewer edge-case regressions. 🚦 4) Type your integration boundaries DeepPartial is tempting, but prefer custom mapped types that match your domain (e.g., Patch<T> where only specific keys are patchable). This is where enterprise integrations break. 🔧 Takeaway: treat utility types as architecture tools, not syntax tricks. Your future self (and your CI pipeline) will thank you. 🧩✨ #typescript #frontend #nodejs #reactjs #softwarearchitecture #webdevelopment