Dev.to·Saturday, December 27, 2025

Dev.to - Saturday, December 27, 2025

10 stories~15 min

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Stories Covered

# Building an HTTP Module in Node.js Using the HTTP Server

Understanding Node.js's native http module is like learning to drive a manual car before switching to automatic—it gives you complete control and deep insight into how web servers actually work. While frameworks like Express.js abstract away complexity, mastering the core http module is essential for building performant backend applications and troubleshooting production issues. The http module is Node.js's built-in library for creating HTTP servers and handling network requests. It provides low

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Building a Zero-Trust Security Gateway for Local AI

Introduction As Generative AI becomes integrated into enterprise workflows, the risk of Prompt Injection has moved from a theoretical threat to a critical vulnerability. In this post, I document how I identified a data leakage vulnerability in a local LLM deployment and engineered a custom Python Security Gateway to mitigate it. The Stack AI Engine: Ollama (Llama 3.2) Frontend: Open WebUI (Dockerized) Security Layer: FastAPI Middleware (The Hardened Gateway) Environment: Ubuntu Linux with Dock

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Angular Zoneless: Migrating off Zone.js without breaking your UI

You know that feeling when you change a value in a callback… and Angular “magically” updates the UI? Until it doesn’t. That “magic” has historically been Zone.js. And as Angular moves toward Zoneless change detection, a lot of apps are discovering just how much they were relying on incidental change detection ticks. This post is a practical, dev-to-dev walkthrough of: what Zone.js did for Angular what replaces it in an Angular Zoneless app what breaks during migration (and why) patterns that “ju

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How to Choose the Right Service Provider on Creosca as a Reseller

Starting a digital service business is exciting, but choosing the right service provider can make or break your success. On Creosca, resellers have access to multiple verified providers for services like web hosting, VPNs, proxies, domains, AI tools, and more. But not every provider fits every reseller. Some are better for beginners, while others cater to high-volume or premium clients. Choosing the right one ensures quality service for your customers, smooth automation, and healthy profits for

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Building a Serverless Invoice Generator with React, Zustand, and Tailwind

I just shipped a new portfolio project: a Free Invoice & Document Generator that runs entirely in the browser. I wanted to challenge myself to build a complex form-handling application without relying on a backend database. The goal was to create something useful for freelancers that respects user privacy by design. The app allows users to generate professional Invoices, Quotes, and Receipts instantly. Because it uses Local Storage, users can close the tab and come back later without losing the

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I Built a SaaS in 9 Days for $200, Launched on HN to Zero Signups - Here's What I Learned

Hey everyone! I'm Jack, a consultant in Denmark who just launched my first SaaS product. Here's what happened. ClearNoteLab - a tool that transforms messy meeting notes into professional, client-ready PDFs in 30 seconds using AI. The problem: The solution: Timeline: Cost: Stack: No-code tool: I'm not a developer by trade, but Bolt AI let me ship fast. The product works, the tech stack is solid, and I even built proper Stripe integration. Right before launch, I discovered a critical Stripe webhoo

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Building a Production-Ready Headless eCommerce API with Laravel

Headless eCommerce has become a popular architecture for modern web and mobile applications. Instead of coupling the frontend with the backend, developers can build flexible systems where the backend exposes APIs and the frontend consumes them independently. In this article, I’ll walk through how I built a production-ready headless eCommerce API using Laravel, the architectural decisions behind it, and lessons learned from real-world projects. Headless eCommerce means separating the backend busi

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The Transformer Architecture: A Deep Dive into How LLMs Actually Work

Originally published at pranaybathini.com/learn/llm-fundamentals/transformer-architecture After spending months studying transformer architectures and building LLM applications, I realized something: most explanations are overwhelming or missing out some details. This article is my attempt to bridge that gap — explaining transformers the way I wish someone had explained them to me. For an intro into what Large language model (LLM) means, refer this article I published previously. By the end of t

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Google A2UI: The Future of Agentic AI for DevOps & SRE (Goodbye Text-Only ChatOps)

The era of "Text-Only" ChatOps is ending. Google's new open-source protocol, A2UI, lets AI agents render native, interactive interfaces. Here is what Platform Engineers and SREs need to know. What is it? A2UI (Agent-to-User Interface) is a new open-source standard by Google that lets AI agents generate UI components (JSON) instead of raw text or HTML. Why care? It solves the "Wall of Text" problem in ChatOps. Agents can now pop up interactive forms, charts, and buttons inside your chat app o

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Why Leaderboards Matter in Web3 Games More Than Token Prices

In many Web3 games, attention is often focused on token prices, short-term rewards, and speculative opportunities. However, one of the most overlooked yet powerful systems in sustainable Web3 gaming is the leaderboard. In BUBUVERSE, leaderboards are not designed as cosmetic features. They function as behavioral indicators that measure consistency, participation, and long-term engagement across the ecosystem. Unlike traditional scoreboards that reset frequently or reward single actions, BUBUVERSE

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