How Instagram, WhatsApp, Uber & Netflix Would Be Built Today Using Expo RouterMay 21, 2026·28 min read
How Instagram Stores Reels, Photos, and Drafts Behind the ScenesNote: This article discusses architectural patterns commonly used across large-scale social media platforms. It uses Instagram as a practical reference point, not as a source of proprietary insider knMay 31, 2026·18 min read
Handling File Uploads in Express with MulterWhy File Uploads Need Middleware When a browser submits a standard HTML form with text fields, the data is encoded as a URL-encoded string and sent in the request body. The format looks like this nameMay 6, 2026·11 min read
JWT Authentication in Node.js Explained SimplyWhat Authentication Means Authentication is the process of verifying that a user is who they claim to be. Before a server grants access to protected resources, it needs to confirm the identity of the May 6, 2026·10 min read
Sessions vs JWT vs Cookies: Understanding Authentication ApproachesWhat Sessions Are A session is a server-side record that tracks the state of a user across multiple HTTP requests. Because HTTP is stateless by design, each request from a client is independent with nMay 6, 2026·9 min read
REST API Design Made Simple with Express.jsWhat REST API Means An API, or Application Programming Interface, is a defined way for two systems to communicate. In web development, this usually means a client - a browser, a mobile app, or anotherMay 6, 2026·9 min read
What is Middleware in Express and How It WorksWhat Middleware Is in Express In Express, middleware is a function that has access to the incoming request object (req), the outgoing response object (res), and a function called next that passes contMay 6, 2026·8 min read
URL Parameters vs Query Strings in Express.jsWhat URL Parameters Are A URL parameter is a named placeholder inside a route path that captures a specific segment of the URL. It is part of the path itself, not appended after it. Consider this URL May 6, 2026·7 min read
