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NestJS Authentication with PostgreSQL, JWT & Refresh Tokens
NestJS authentication looks simple in most tutorials: create a login endpoint, compare a password, generate a JWT, and protect a route. That is enough to understand the basic idea, but it is not enough for a real application. Once authentication reaches production, you also need to think about password hashing, database constraints, token expiration, refresh…
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Build REST API with NestJS: Production-Ready Guide
NestJS is one of the Node.js frameworks I reach for when a project needs more structure than a small Express application. For quick APIs, Express or Hono can be excellent. But once a backend starts growing authentication, modules, services, database access, validation, background jobs, integrations, testing having a clear architecture becomes much more valuable. That…
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Can Node.js Be Used for Frontend Development? Practical 2026 Guide
Node.js frontend development can sound confusing because Node.js does not actually replace the browser. However, Node.js plays a major role in modern frontend projects through build tools, package management, server-side rendering, testing, automation, and full-stack frameworks. So, can Node.js be used for frontend development? Yes, but usually as the runtime supporting, building, or serving the…
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JavaScript ES5 vs ES6: What Still Matters in Modern JavaScript
ES6 changed JavaScript dramatically, but modern JavaScript has moved far beyond ES2015. This practical guide explains the ES5 vs ES6 differences that still matter when reading, maintaining and modernizing real code.
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Building Microservices with Node.js: What Actually Matters in Production
Microservices are easy to explain on a whiteboard. You draw a few boxes, connect them with arrows, give every box a database, and suddenly the application looks clean and scalable. Production is where the interesting part begins. One service becomes slow. Another service is unavailable. The same message is delivered twice. A database update succeeds…
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Node.js vs Express: Runtime, Framework, and When You Need Each
Node.js and Express are not competing technologies. This practical guide explains what Node provides, what Express adds, how their code differs, and when using raw Node or another framework makes sense.
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React vs Next.js: How I Choose for Real Projects
“Should I use React or Next.js?” sounds like a simple framework comparison. I don’t really see it that way. Next.js uses React. So the decision is not usually React instead of Next.js. The real decision is closer to this: That distinction matters because I would make a very different choice for an internal admin dashboard…
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Learn React from Scratch: A Practical Beginner Guide
React becomes much easier to learn once you stop trying to memorize every hook, API and library at the same time. I prefer learning React in layers. First understand components. Then understand how data moves through those components. After that, state, events, forms, Effects and routing start making much more sense. That is the approach…
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React Interview Questions: 25 Real-World Questions for Experienced Developers
Skip the memorized React definitions. These 25 practical React interview questions focus on state, Effects, rendering bugs, performance, Server Components, Suspense and decisions developers face in real applications.