KESHAV VERMA’s Post

🚀 I Already Knew Backend… But Sessions Changed How I Think About It You can build APIs… You can connect databases… But until you understand **how apps maintain state**, you're missing a core piece of backend engineering. Today, I implemented **sessions using Express.js** — and it finally clicked 🔥 --- 👉 What I explored: • Tracking user visits using session state • Persisting user-specific data (like name) • Building personalized routes without a database --- 💡 The shift: ❌ Stateless HTTP (every request is independent) ✅ Stateful experience using sessions (server remembers you) 📦 Tech Stack: • Node.js • Express.js • express-session 🔗 GitHub Repository: 👉 https://lnkd.in/dE4ZP2Xv 💬 Takeaway: Sessions are not just a feature — they’re the backbone of **login systems, carts, and personalization**. #NodeJS #ExpressJS #BackendDevelopment #WebDevelopment #MERN #CodingJourney #100DaysOfCode

Building scalable applications is not just about writing code… It’s about writing the right logic 💡 While working with Node.js, I learned: ✔ Business logic matters more than syntax ✔ Real-world problems need real solutions ✔ Clean structure = scalable system From payment allocation to journal entries — every line of code should solve a problem 🚀 #NodeJS #BackendDevelopment #BusinessLogic #FullStackDeveloper

I’ve been working on a full-stack financial tracking application to help users visualize their spending habits and manage their savings more effectively. Key Features: Data Visualization: Interactive charts showing monthly cash flow and spending breakdowns. Transaction Management: A searchable, paginated history of all financial activities. Smart Insights: Automatic calculation of savings rates and identifying the "best" financial months. Responsive UI: A clean, dark-mode interface built with [mention your CSS tool, e.g., Tailwind CSS]. Tech Stack: React, Node.js, Express, and MongoDB. Check out the demo below! Feedback is always welcome. #WebDevelopment #MERNStack #ReactJS #FinanceApp #CodingProject

Hitesh Choudhary “Production” used to scare me. It always felt like something only experienced developers deal with… Something you touch only after finishing courses, building projects, and “being ready.” But in this backend lecture, something unexpected happened. I deployed early. Not a perfect app. Not a polished project. Just a simple backend… running live. And that changed everything. 💻 Here’s what I actually did: • Set up a Node.js project from scratch • Created a server using Express • Learned why .env files are critical (and how mistakes can expose secrets) • Understood the real flow: Localhost ➝ GitHub ➝ Live Server No shortcuts. No magic tools. Just understanding how things actually work. 💡 The biggest realization? “Production” is not a big scary thing. It’s just: Your code A server Someone sending a request That’s it. That mental shift made backend feel real… not just something inside tutorials. ⚡ From here, I’m focusing on: • Building real APIs • Writing cleaner, structured code • Deploying more projects (not waiting till the end anymore) If you're learning backend and still avoiding deployment… Try doing it early once. It might change how you see everything. 🔗 Video I followed: [https://lnkd.in/g7dyA6nm] #BackendDevelopment #NodeJS #ExpressJS #LearningInPublic #Deployment #WebDevelopment #100DaysOfCode

𝘐 𝘶𝘴𝘦𝘥 𝘵𝘰 𝘵𝘩𝘪𝘯𝘬 𝘣𝘶𝘪𝘭𝘥𝘪𝘯𝘨 𝘈𝘗𝘐𝘴 𝘸𝘢𝘴 𝘴𝘪𝘮𝘱𝘭𝘦. 𝘊𝘳𝘦𝘢𝘵𝘦 𝘳𝘰𝘶𝘵𝘦𝘴, 𝘸𝘳𝘪𝘵𝘦 𝘴𝘰𝘮𝘦 𝘭𝘰𝘨𝘪𝘤, 𝘤𝘰𝘯𝘯𝘦𝘤𝘵 𝘵𝘩𝘦 𝘥𝘢𝘵𝘢𝘣𝘢𝘴𝘦… 𝘥𝘰𝘯𝘦. Everything works fine until the project starts growing. Suddenly -> 𝘝𝘢𝘭𝘪𝘥𝘢𝘵𝘪𝘰𝘯 𝘭𝘰𝘨𝘪𝘤 𝘪𝘴 𝘳𝘦𝘱𝘦𝘢𝘵𝘦𝘥 𝘦𝘷𝘦𝘳𝘺𝘸𝘩𝘦𝘳𝘦 -> 𝘈𝘶𝘵𝘩 𝘤𝘩𝘦𝘤𝘬𝘴 𝘢𝘳𝘦 𝘴𝘤𝘢𝘵𝘵𝘦𝘳𝘦𝘥 𝘢𝘤𝘳𝘰𝘴𝘴 𝘳𝘰𝘶𝘵𝘦𝘴 -> 𝘉𝘶𝘴𝘪𝘯𝘦𝘴𝘴 𝘭𝘰𝘨𝘪𝘤 𝘴𝘵𝘢𝘳𝘵𝘴 𝘭𝘪𝘷𝘪𝘯𝘨 𝘪𝘯𝘴𝘪𝘥𝘦 𝘤𝘰𝘯𝘵𝘳𝘰𝘭𝘭𝘦𝘳𝘴 Nothing feels completely broken, but everything feels harder to manage. 𝐑𝐞𝐜𝐞𝐧𝐭𝐥𝐲, 𝐈 𝐬𝐭𝐚𝐫𝐭𝐞𝐝 𝐥𝐞𝐚𝐫𝐧𝐢𝐧𝐠 𝐍𝐞𝐬𝐭𝐉𝐒. And it made me realize something important. Backend development isn’t just about making endpoints work. It’s about how you structure your system NestJS forces a different approach. -> 𝘊𝘰𝘯𝘵𝘳𝘰𝘭𝘭𝘦𝘳𝘴 𝘩𝘢𝘯𝘥𝘭𝘦 𝘳𝘦𝘲𝘶𝘦𝘴𝘵𝘴 -> 𝘚𝘦𝘳𝘷𝘪𝘤𝘦𝘴 𝘩𝘢𝘯𝘥𝘭𝘦 𝘭𝘰𝘨𝘪𝘤 -> 𝘊𝘳𝘰𝘴𝘴 𝘤𝘶𝘵𝘵𝘪𝘯𝘨 𝘤𝘰𝘯𝘤𝘦𝘳𝘯𝘴 𝘭𝘪𝘬𝘦 𝘢𝘶𝘵𝘩 𝘢𝘯𝘥 𝘷𝘢𝘭𝘪𝘥𝘢𝘵𝘪𝘰𝘯 𝘴𝘵𝘢𝘺 𝘴𝘦𝘱𝘢𝘳𝘢𝘵𝘦 At first, it felt like extra work. But now it’s clear this structure is what keeps things scalable For me, the shift was simple From just making it work to making it maintainable Still learning, but this changed how I think about backend development 𝘊𝘶𝘳𝘪𝘰𝘶𝘴 𝘸𝘩𝘢𝘵 𝘸𝘢𝘴 𝘵𝘩𝘦 𝘮𝘰𝘮𝘦𝘯𝘵 𝘵𝘩𝘪𝘯𝘨𝘴 𝘴𝘵𝘢𝘳𝘵𝘦𝘥 𝘤𝘭𝘪𝘤𝘬𝘪𝘯𝘨 𝘧𝘰𝘳 𝘺𝘰𝘶 #BackendDevelopment #NestJS #NodeJS #SoftwareEngineering #FullStackDevelopment #CleanCode #ScalableSystems

I used to think backend = writing APIs. Create route. Connect DB. Return response. But while building my project, I realized: Writing APIs is easy. Designing how everything works together is hard. Handling data flow, edge cases, failures — that’s the real backend. Now I think before coding: “What can go wrong here?” Small shift, big difference. How do you approach backend — code first or thinking first? #NodeJS #BackendDevelopment #LearnInPublic

Over-fetching is something I’ve personally seen while working on backend systems — especially in real-world APIs. Everything works fine at first… until performance drops, APIs slow down, and server costs start increasing. The problem? Sending more data than the frontend actually needs. In backend development (like with NestJS), it’s tempting to return full entities or load relations by default — but that comes at a cost. ⚠️ Larger payloads ⚠️ Unnecessary DB queries ⚠️ Slower response times What I’ve learned: APIs should be designed based on use-cases, not database structure. Now I focus on: ✅ Returning only required fields ✅ Avoiding unnecessary relations ✅ Building endpoints per feature, not “one for all” Small change in thinking → Big impact on performance. Still learning and improving every day 🚀 #NestJS #BackendDevelopment #API #Performance #Scalability #Learning

📚 Today’s Learning: Node.js I spent some time understanding how Node.js works and why it is widely used for backend development. What makes Node.js powerful? • Runs JavaScript outside the browser • Built on the high-performance V8 engine • Uses an asynchronous, non-blocking model • Handles multiple client requests efficiently How it works ? When a request arrives, it goes to the event queue. The event loop processes simple tasks immediately and delegates heavy operations (like file access or database queries) to the thread pool. Once completed, a callback sends the response back to the client. This architecture makes Node.js ideal for applications that require high scalability and real-time interactions. Common applications include chat platforms, streaming services, APIs, and cloud-based microservices. Looking forward to building projects using Node.js. #NodeJS #BackendDevelopment #JavaScript #CodingJourney #Developers #LearningInPublic

Building Scalable APIs Isn’t Just About Code — It’s About Design As a backend developer, one thing I’ve learned is this: Writing code is easy. Designing systems that scale is the real challenge. Today, I focused on improving how I structure my APIs using Node.js + Express — and here are a few key takeaways: 🔹 Always separate concerns (Controllers, Services, Routes) 🔹 Keep business logic out of controllers 🔹 Use proper error handling & logging 🔹 Design APIs with future scaling in mind 🔹 Validate everything (never trust client input) 💡 One small improvement I made today: Moved all loan calculation logic into reusable service functions — making the API cleaner, testable, and production-ready. Consistency > Complexity. Every day, 1% better. #BackendDevelopment #NodeJS #ExpressJS #APIDesign #SoftwareEngineering #CodingJourney #Developers #TechGrowth

DAY 89/365 Things You Need to Know About Node.js Today I went deeper into Node.js, and here’s what stood out: ✔ It’s not a language it runs JavaScript on the server ✔ It’s asynchronous — handles many users at once ✔ It’s perfect for APIs and scalable systems ✔ It uses npm — meaning you can build faster with powerful tools But the biggest lesson? Node.js is built for the future of software. As I continue building systems like loan platforms and dashboards, I’m realizing: 🔥 Speed matters 🔥 Scalability matters 🔥 Structure matters Day 89 reminder: Don’t just learn Node.js… learn how to build systems that people can depend on. #Day89 #NodeJS #CodingJourney #BuildInPublic #SoftwareDevelopment #Consistency