Built and deployed a real-time collaborative coding app from scratch. This project focuses on live multi-user editing and clean deployment architecture: - Real-time collaboration with **Yjs + y-socket.io** - In-browser code editor with **Monaco Editor** - Frontend built with **React + Vite** - Backend with **Node.js + Express + Socket.IO** - Containerized setup with **Docker** - Deployed with **AWS (ALB backend)** and **Vercel (frontend)** What I enjoyed most was solving the full flow end-to-end: building the product, wiring realtime sync, handling multi-window sessions, preparing Docker builds, pushing to GitHub, and shipping to production. Live app: https://lnkd.in/dA4rCiJr Thanks to Sheryians Coding School Youtube Channel I’m continuing to improve it with HTTPS backend hardening, better observability, and smoother CI/CD. #webdevelopment #reactjs #nodejs #aws #docker #vercel #realtime #javascript #softwareengineering

Real-time is more than just "instant." It’s about the Architecture. 🏗️ Following up on my MERN journey, I wanted to share a peek "under the hood" of my Real-Time Chat Application. One of the most critical parts of building this was setting up the Socket.io server correctly. It’s not just about connecting; it’s about managing data flow securely and efficiently. Key implementations in this snippet: 🔐 CORS Configuration: Ensuring secure communication between my Vite-based frontend and the Node.js backend. ⚡ Event Handlers: Using io.on("connection") to manage unique user sessions and send_message to broadcast data instantly. 🚪 Clean Disconnects: Handling user exits to keep the server lightweight and responsive. The Lesson: Building the UI is the "what," but building a stable server is the "how." Transitioning from static APIs to bi-directional WebSockets has been a huge eye-opener in my development journey. I’m currently focusing on making my code clean, optimized, and bug-free. To my fellow engineers: When you were first learning WebSockets, what was the hardest concept to grasp? (For me, it was definitely state syncing!) 👇 #MERNStack #NodeJS #WebSockets #BackendDevelopment #LearningInPublic #SoftwareEngineering #Javascript #SocketIO #WebDev

⚡ Node.js Event Loop Explained (Why Node.js is So Fast) One of the most common questions: 👉 “Node.js handles thousands of requests with a single thread… here’s how 👇” The answer is the Event Loop. Let’s break it down 👇 --- 🧠 1️⃣ Single Thread — But Non-Blocking Node.js runs on a single thread. But instead of blocking operations, it uses: ✔ Asynchronous programming ✔ Non-blocking I/O This allows it to handle multiple requests efficiently. --- ⚙️ 2️⃣ How Event Loop Works When a request comes in: 1️⃣ Task goes to Call Stack 2️⃣ Async operations go to Web APIs / Libuv 3️⃣ Completed tasks move to Callback Queue 4️⃣ Event Loop pushes them back to Call Stack --- 🔁 Event Loop Flow Call Stack ⬇ Async Task (API / DB / Timer) ⬇ Callback Queue ⬇ Event Loop ⬇ Execute Callback --- 📊 Why This is Powerful Instead of waiting for one task to finish… Node.js continues processing other requests. ✔ Handles thousands of connections ✔ Efficient for I/O-heavy apps ✔ Great for real-time systems --- 🚀 Real-World Use Cases Node.js is widely used for: 💬 Chat applications 📡 Real-time APIs 📊 Streaming systems 🌐 Backend services --- ⚠️ Important Note CPU-heavy tasks can block the event loop. That’s why Node.js is best for: ✔ I/O-heavy tasks ❌ CPU-intensive operations (use workers) --- 💡 Final Thought Node.js is not fast because it’s multi-threaded… It’s fast because it doesn’t wait. --- Have you faced event loop blocking issues in your apps? Let’s discuss 👨💻 #NodeJS #EventLoop #BackendDevelopment #JavaScript #SystemDesign #SoftwareEngineering #AsyncProgramming #DeveloperCommunity #TechExplained #WebDevelopment

Node.js is often called single threaded… but it still handles multiple tasks at the same time. How? 🤔 This is where a lot of confusion starts. Yes, Node.js runs on a single main thread, but it’s not limited. The real strength comes from how it manages work behind the scenes ⚡ Here’s what’s really happening: • Event loop keeps the app responsive with non blocking I/O 🔄 • libuv thread pool handles background operations 🧩 • Worker threads take care of CPU heavy tasks 🧠 The idea is simple. • Main thread handles requests, callbacks, async flows • Heavy work gets offloaded to worker threads • Event loop stays free and fast 🚀 Because of this, you can: • Process large datasets • Run complex calculations • Handle parallel tasks All without slowing down your application. In real systems, this becomes critical. I’ve seen APIs freeze because of a single heavy operation. Moving that to worker threads instantly improved performance 📈 So Node.js isn’t multi threaded by default, but it’s built to scale intelligently when you use the right tools. Curious to hear, are you using worker threads in production or mostly relying on async patterns? 💬 #Nodejs #JavaScript #Backend #SystemDesign #Concurrency #WebDevelopment

Just built a real-time chat app from scratch using Node.js, TypeScript, and WebSocket! 🚀 I structured the entire project following SOLID principles and clean architecture. The result: A well-organized codebase with clear separation of concerns: - Domain layer, pure entities and interfaces, zero dependencies - Application layer, focused use cases (join, send message, leave) - Infrastructure layer, WebSocket server adapter + in-memory repositories - Presentation layer, handlers that translate protocol to business logic Everything is wired together through dependency injection in a single composition root. Swapping the in-memory storage for a real database? Just implement the interface, no business logic changes needed. It was a great exercise in thinking about architecture even in smaller projects. Clean code isn't just for large teams, it's a mindset. Check out the full source code here: 👉 https://lnkd.in/eAVX55x8 Tech stack: Node.js | TypeScript | WebSocket (ws) | Clean Architecture | SOLID Would love to hear your thoughts, how do you approach architecture in your side projects? #NodeJS #TypeScript #WebSocket #CleanArchitecture #SOLID #BackendDevelopment #SoftwareEngineering #OpenSource

🚀 Efficient API Data Fetching in React Many React apps suffer from bad API handling. Here are some strategies that consistently work in production 👇 ⚡ 1. Use React Query or SWR They manage caching and refetching automatically. ⚡ 2. Avoid Duplicate API Calls Cache results whenever possible. ⚡ 3. Show Loading and Error States Always handle API states properly. ⚡ 4. Use Background Refetching Keep data fresh without blocking UI. ⚡ 5. Cancel Unnecessary Requests Abort requests when components unmount. #React #programming #webdevelopment #reactjs   #coding #dailyUpdate #Developer 💻

🚀 Node.js & CPU-Intensive Tasks — What Most Developers Get Wrong Node.js is built for asynchronous, non-blocking I/O — which is why it powers fast APIs, real-time apps, and scalable backend systems. But here’s the catch 👇 👉 Node.js is NOT naturally optimized for CPU-intensive tasks. 🧠 The Reality Node.js runs on a single-threaded event loop. So when you run a heavy computation like: Large loops Image/video processing Data-heavy transformations ⚠️ It blocks the event loop Result? Slow API responses Poor performance under load Bad user experience ⚙️ So How Does Node.js Handle It? 🧵 1. Worker Threads (Best Approach) Run CPU-heavy tasks in parallel threads. ✅ True multi-threading ✅ Separate execution context ✅ Ideal for heavy computations ⚖️ 2. Cluster (Scaling, not computation) Use all CPU cores by spawning multiple processes. ✅ Great for high traffic 🧩 3. Child Processes Offload work to separate processes. ✅ Full isolation #NodeJS #BackendDevelopment #SystemDesign #JavaScript #Scalability #TechCareers

🧑💻 Yesterday, Ankur Prajapati Bhaiya gave us a task to deeply study the Socket.IO documentation and understand how real time communication actually works behind modern web applications. The focus of the session was on important concepts like emitting events, listening to events, broadcasting messages, working with rooms, and understanding how Socket.IO scales using tools like Redis Streams Adapter and MongoDB Adapter. Through this task, I explored how servers and #clients communicate with each other in real time. I learned how events are #emitted from the client and captured by the server, how the server can broadcast messages to multiple users, and how rooms help organize users into groups for targeted communication. This concept is extremely useful when building applications like chat platforms, live collaboration tools, multiplayer games, and real time notification systems. Another interesting part was understanding #adapters like Redis Streams Adapter and MongoDB Adapter. These adapters help scale Socket.IO applications when the app runs on multiple servers. Instead of keeping messages limited to one server, adapters allow events to be shared across different instances so that all connected users receive updates instantly. I also studied how middlewares work in #Socket.IO to add authentication, logging, or validation before allowing a socket connection. This adds an extra layer of control and security in real time systems. This task helped me understand that real time systems are not only about sending messages instantly. They require proper architecture, event driven design, and scalable infrastructure to work efficiently in production level applications. Huge thanks to Ankur Bhaiya and the entire Sheryians Coding School team for designing tasks that push us to explore real documentation instead of just following tutorials. Learning directly from docs builds the mindset of a real developer who can understand technologies deeply and apply them in real world projects. Excited to apply these concepts in upcoming projects and build scalable real time applications. 📡💻 #WebDevelopment #SocketIO #BackendDevelopment #RealTimeApps #NodeJS #JavaScript #FullStackDevelopment #SheryiansCodingSchool #LearningInPublic #DeveloperJourney

🚀 What are the Key Features of Node.js? Every Developer Should Know: Node.js has become one of the most popular technologies for building scalable and high-performance applications. Here are some of the powerful features that make it stand out: 🔹 Asynchronous & Non-Blocking I/O All APIs in Node.js are non-blocking. Tasks like file reading, database calls, or network requests run asynchronously without blocking the main thread. This makes Node.js perfect for handling thousands of simultaneous users. 🔹 Single-Threaded but Highly Scalable Node.js uses a single-threaded event loop, yet it can efficiently handle 10k+ concurrent connections without creating multiple threads, making applications lightweight and fast. 🔹 Event-Driven Architecture Node.js works on an event-based system using events and callbacks (like on and emit). This architecture is ideal for real-time applications and asynchronous operations. 🔹 Powered by the V8 Engine Node.js runs on Google’s V8 JavaScript engine, which compiles JavaScript into machine code using Just-In-Time (JIT) compilation for lightning-fast performance. 🔹 Cross-Platform Development Applications built with Node.js can run seamlessly on Windows, Linux, and macOS, enabling developers to build once and deploy anywhere. 🔹 NPM Ecosystem Node.js comes with NPM (Node Package Manager), the largest ecosystem of open-source libraries with 1M+ packages, helping developers build applications faster. 🔹 Streaming Capabilities Node.js processes data in chunks (streams) instead of loading everything into memory. This is extremely useful for large file processing, video streaming, and data pipelines. 🔹 Real-Time Communication Node.js supports technologies like WebSockets, making it ideal for building chat apps, live notifications, collaborative tools, and online gaming platforms. 🔹 Native JSON Support Since Node.js uses JavaScript, it works naturally with JSON, making it perfect for building REST APIs and microservices. 🔹 Highly Extensible Node.js easily integrates with databases, caching systems, message queues, and microservices, allowing developers to build scalable architectures. 💡 Why Developers Love Node.js? It enables fast development, high scalability, and real-time performance for modern web applications. #MERNStack #MEANStack #FullStackDevelopment #NodeJS #JavaScript #BackendDevelopment #WebDevelopment #FullStackDeveloper #SoftwareEngineering #Programming #Developers #TechCommunity #100DaysOfCode

Building a full-stack system taught me more than any tutorial. While building features like queue workflows, patient records, and billing systems, I realized something: Most tutorials show you how to build features. But real systems are about handling complexity. Here are a few things I learned: • APIs are easy to call — but hard to design properly • Authentication & role-based access add real complexity • Data flow between frontend and backend is where most bugs happen • Real-world edge cases break “perfect code” quickly • Structuring services matters more than writing endpoints Especially while designing queue workflows and patient data systems. One thing became clear: Building real-world systems changes how you think as a developer. React, Node.js, Express, SQLite Still learning, still improving. #FullStack #ReactJS #NodeJS #SoftwareEngineering #BuildInPublic #LearningInPublic