Implementing Global Error Handling in NodeJS

Day 85/100 #100DaysOfCode 🧑🏻💻 Focused on professional error handling in backend systems. 📍 Implemented standardized error response structure (JSON format) 📍 Learned proper use of HTTP status codes 📍 Improved error messaging for better debugging 📍 Created custom error classes for structured handling 📍 Followed best practices for reusable error logic Better errors = better systems. #100DaysOfCode #Backend #NodeJS #ErrorHandling #MERN

Skill Boosters — Notes #9: Node.js V8 Engine & Microservices 🔗 Read full article: https://lnkd.in/gV87EbEC Ever wondered why Node.js is so fast? 👇 V8 Engine - Converts JavaScript → Machine Code - Executes it super fast Microservices - Break app into small services - Each service works independently Why this matters? ✔ V8 → Speed ✔ Microservices → Scalability Real Meaning Fast execution + Scalable system = Powerful backend architecture One Line Takeaway: Node.js + V8 = Speed | Microservices = Scale What do you prefer: Monolith or Microservices? #NodeJS #Microservices #BackendDevelopment #JavaScript #SystemDesign

💡 Node.js Async/Await — Clean & Efficient Code const data = await fetchData(); console.log(data); Why it matters: • Cleaner, readable async code 🧠 • Better error handling ⚡ • Smooth, non-blocking performance 🚀 👉 Async/Await = faster, smarter backend development. #NodeJS #AsyncAwait #CleanCode #WebDevelopment

🚀 “Everything was fine… until traffic increased.” (Node.js lesson) Hey backend devs 👋 We deployed an API that worked perfectly in testing. Then traffic hit… 💥 Boom: Response time increased Requests started queueing Some requests timed out 👉 Root cause? We were doing heavy JSON processing inside the request handler. 💡 The mistake: Treating Node.js like a multi-threaded system 💡 The fix: ✔ Move heavy processing to background jobs ✔ Use queues (BullMQ) ✔ Keep APIs fast and lightweight ⚡ Real lesson: Your API should respond fast… not do everything. 👉 Rule: “Handle request fast, process later.” Have you optimized APIs like this before? #nodejs #backend #performance #scalability #javascript #webdevelopment #softwareengineering #Coding #TechCareers #Programming #success

Worked on a small API change today and noticed something interesting. A slight inconsistency in the Spring Boot response ended up adding multiple checks in the React components. Nothing major — but it quickly made the UI logic more complex than it needed to be. Fixing the API structure simplified everything: Fewer conditionals Cleaner state updates More predictable behavior It’s a small reminder that even minor backend changes can have a noticeable impact on the frontend. Sometimes the simplest fix is just making the contract clearer. #JavaDeveloper #SpringBoot #ReactJS #FullStackDeveloper #RESTAPI #SoftwareEngineering #BackendDeveloper #FrontendDeveloper

NODE.JS — PART 3 (HTTP Server & APIs) This is where Node.js becomes practical. In this post: • Creating a basic HTTP server • Understanding request (req) and response (res) • Handling routes • Building simple APIs • Sending JSON data This is the foundation of backend development, because APIs are what connect frontend applications to data. Understanding this flow makes it easier to build full-stack applications. 📌 Save this for revision. #NodeJS #BackendDevelopment #WebDevelopment #JavaScript #FullStack #APIs #LearningInPublic #Consistency

NodeJS Session - 4 🚀 Node.js Intermediate Level – Real Development Guide Once you move beyond basics, the real journey begins… building actual applications. In this stage, I focused on mastering backend development using Express.js and understanding how real-world systems work. 🔹 What you should learn:
• Routing – handling different endpoints
• Middleware – processing requests in between
• REST APIs – designing scalable services
• Request/Response lifecycle – how data flows 👉 And the most important part:
Build a CRUD API (Create, Read, Update, Delete) This is where concepts turn into practical skills. 💡 Tip: Don’t just learn—build projects. That’s where real growth happens. #NodeJS #ExpressJS #BackendDevelopment #WebDevelopment #FullStack #LearningJourney #Developers #Coding #100DaysOfCode

Bug that wasted my 2 hours 😅 Error: API not working Reason: Wrong CORS setup 👉 Fix: Properly configure backend CORS Always check backend config first! #nodejs #debugging #webdev

NODE.JS — PART 5 (MVC Architecture) Writing backend code is not just about making APIs work — it’s about structuring them properly as applications grow. This post covers: • What MVC architecture is • Role of Models, Controllers, and Routes • How middleware fits into the flow • Typical Node.js project structure • How requests flow through a backend system A well-structured backend makes applications easier to scale, debug, and maintain. 📌 Save this for revision. #NodeJS #BackendDevelopment #ExpressJS #WebDevelopment #FullStack #JavaScript #MVC #LearningInPublic #Consistency

Diving deeper into backend development with Express.js 🚀 What stands out is how effortlessly it simplifies building server-side applications on top of Node.js. Its minimal and flexible structure makes handling routes, middleware, and APIs clean and efficient. Working with Express has been a great way to understand how requests flow through an application — from routing to middleware execution and finally to response handling. It brings clarity to structuring scalable and maintainable backend systems. Also fascinating to explore concepts like RESTful APIs, error handling, and middleware chaining, which are essential for building production-ready applications. Excited to keep building and refining backend architecture with better patterns and practices. #ExpressJS #NodeJS #BackendDevelopment #WebDevelopment #JavaScript