--- title: "#abdulrdeveloper articles | Hashnode" description: "Explore 8 articles tagged #abdulrdeveloper on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/abdulrdeveloper" --- Tag # #abdulrdeveloper 8 posts · 0 followers [Abdul Rahman](https://hashnode.com/@abdulrdeveloper) · [Oct 31](https://hashnode.com/posts/nodejs-file-upload-fs-buffer-multer/6ae5cd6c765e6a14f19a887e) ### [From Bytes to the Cloud: How Node.js Reads, Validates and Uploads Files](https://blog.abdulrdeveloper.me/nodejs-file-upload-fs-buffer-multer?utm_source=hashnode&utm_medium=feed) Learn how Node.js handles files: fs module, Buffer, magic bytes, Multer validation and cloud storage with Cloudinary and ImageKit. 12 min read · [blog.abdulrdeveloper.me](https://blog.abdulrdeveloper.me/nodejs-file-upload-fs-buffer-multer?utm_source=hashnode&utm_medium=feed) [1](https://hashnode.com/posts/nodejs-file-upload-fs-buffer-multer/6ae5cd6c765e6a14f19a887e) [Abdul Rahman](https://hashnode.com/@abdulrdeveloper) · [Oct 23](https://hashnode.com/posts/authentication-vs-authorization-in-nodejs-express/6adb3d3daae248ff0741ad3b) ### [Authentication vs Authorization: Who Are You, and What Can You Do?](https://blog.abdulrdeveloper.me/authentication-vs-authorization-in-nodejs-express?utm_source=hashnode&utm_medium=feed) Learn the difference between authentication and authorization in backend development with practical Node.js and Express.js middleware examples. 7 min read · [blog.abdulrdeveloper.me](https://blog.abdulrdeveloper.me/authentication-vs-authorization-in-nodejs-express?utm_source=hashnode&utm_medium=feed) [1](https://hashnode.com/posts/authentication-vs-authorization-in-nodejs-express/6adb3d3daae248ff0741ad3b) [Abdul Rahman](https://hashnode.com/@abdulrdeveloper) · [Oct 22](https://hashnode.com/posts/jwt-authentication-nodejs-access-refresh-tokens/6ad9c9af9a6e853b49ffd0e1) ### [Your Server Has Amnesia. JWT Is the Cure.](https://blog.abdulrdeveloper.me/jwt-authentication-nodejs-access-refresh-tokens?utm_source=hashnode&utm_medium=feed) Learn JWT authentication in Node.js: token structure, login flow, protecting routes with middleware, and access and refresh tokens, explained simply. 11 min read · [blog.abdulrdeveloper.me](https://blog.abdulrdeveloper.me/jwt-authentication-nodejs-access-refresh-tokens?utm_source=hashnode&utm_medium=feed) [Abdul Rahman](https://hashnode.com/@abdulrdeveloper) · [Oct 21](https://hashnode.com/posts/javascript-fundamentals-functions-loops-arrays/6ad86dceb7abc8958ad975c7) ### [Think Like a Factory: JavaScript Fundamentals That Actually Stick](https://blog.abdulrdeveloper.me/javascript-fundamentals-functions-loops-arrays?utm_source=hashnode&utm_medium=feed) Learn JavaScript fundamentals with a factory analogy: functions, if-else, loops, arrays, hoisting, map and forEach, explained in simple words. 16 min read · [blog.abdulrdeveloper.me](https://blog.abdulrdeveloper.me/javascript-fundamentals-functions-loops-arrays?utm_source=hashnode&utm_medium=feed) [1](https://hashnode.com/posts/javascript-fundamentals-functions-loops-arrays/6ad86dceb7abc8958ad975c7) [Abdul Rahman](https://hashnode.com/@abdulrdeveloper) · [Oct 12](https://hashnode.com/posts/express-middleware-explained/6accc887fffa4b1c304b5eda) ### [The Guard at Your API’s Gate : Middleware in Express, explained simply](https://blog.abdulrdeveloper.me/express-middleware-explained?utm_source=hashnode&utm_medium=feed) Learn how Express middleware works: next(), execution order, router-level, built-in and error-handling types, plus auth, validation and role checks. 9 min read · [blog.abdulrdeveloper.me](https://blog.abdulrdeveloper.me/express-middleware-explained?utm_source=hashnode&utm_medium=feed) [3](https://hashnode.com/posts/express-middleware-explained/6accc887fffa4b1c304b5eda) [Abdul Rahman](https://hashnode.com/@abdulrdeveloper) · [Oct 11](https://hashnode.com/posts/express-routes-params-and-query-explained/6acb775d387d4c7aaf05d5bc) ### [The Era of Express: Routes, Params and the Art of Handling Requests](https://blog.abdulrdeveloper.me/express-routes-params-and-query-explained?utm_source=hashnode&utm_medium=feed) Learn how Express handles requests: routes, GET and POST, responses, URL params vs query strings, and why route order matters. 10 min read · [blog.abdulrdeveloper.me](https://blog.abdulrdeveloper.me/express-routes-params-and-query-explained?utm_source=hashnode&utm_medium=feed) [Abdul Rahman](https://hashnode.com/@abdulrdeveloper) · [Oct 7](https://hashnode.com/posts/nodejs-internals-event-loop-thread-pool/6ac6169a9a7fe8563f75515f) ### [Behind the Gate: What Node.js Really Does When You Run node app.js](https://blog.abdulrdeveloper.me/nodejs-internals-event-loop-thread-pool?utm_source=hashnode&utm_medium=feed) Learn how Node.js works inside: V8, libuv, the Event Loop phases and the Thread Pool, with simple examples and exercises you can run yourself. 8 min read · [blog.abdulrdeveloper.me](https://blog.abdulrdeveloper.me/nodejs-internals-event-loop-thread-pool?utm_source=hashnode&utm_medium=feed) [Abdul Rahman](https://hashnode.com/@abdulrdeveloper) · [Oct 1](https://hashnode.com/posts/this-in-javascript-the-actor-who-changes-roles/6abe122f7d8cbea4f9a44e84) ### [this in JavaScript: The Actor Who Changes Roles](https://blog.abdulrdeveloper.me/this-in-javascript-the-actor-who-changes-roles?utm_source=hashnode&utm_medium=feed) Learn the JavaScript this keyword with a simple actor analogy: global context, objects, functions, and how the caller changes this. 8 min read · [blog.abdulrdeveloper.me](https://blog.abdulrdeveloper.me/this-in-javascript-the-actor-who-changes-roles?utm_source=hashnode&utm_medium=feed)