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Browse thousands of programming tutorials written by experts. Learn Web Development, Data Science, DevOps, Security, and get developer career advice.
Site URL: www.freecodecamp.org/news
Feed URL: www.freecodecamp.org/news/rss
Posts: 18
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How AI Changed the Economics of Writing Clean Code
https://www.freecodecamp.org/news/how-ai-changed-the-economics-of-writing-clean-code/
Published: April 28, 2026 13:57
If you've ever wanted to add an interface to a codebase and gotten pushback, you already know the argument: "That's twice the code for the same thing." And honestly? It was a fair point. You'd write t
How to Apply STRIDE Threat Modeling and SonarQube Analysis for Secure Software Development
Published: April 28, 2026 13:53
Secure software requires both design-time and code-time protection. STRIDE threat modeling helps identify risks early in system design, while SonarQube enforces secure coding practices through static
How to Set Up OpenID Connect (OIDC) in GitHub Actions for AWS
https://www.freecodecamp.org/news/how-to-set-up-openid-connect-oidc-in-github-actions-for-aws/
Published: April 27, 2026 15:07
If you've been storing AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY as GitHub Secrets to deploy to AWS, you're not alone. It's the most common approach and it's also one of the biggest security risks i
How to Split PDF Files in the Browser Using JavaScript (Step-by-Step)
https://www.freecodecamp.org/news/split-pdf-files-using-javascript/
Published: April 27, 2026 14:28
Working with PDFs is part of everyday development. Sometimes you don’t need the entire document. You just need a few pages — maybe a specific section, a report summary, or selected invoice pages. Most
How to Build Your Own Language-Specific LLM [Full Handbook]
https://www.freecodecamp.org/news/how-to-build-your-own-language-specific-llm-handbook/
Published: April 24, 2026 20:59
What if you could build your own LLM, one that speaks your native language, all from scratch? That's exactly what we'll do in this tutorial. The best way to understand how LLMs work is by actually bui
How to Build a Self-Learning RAG System with Knowledge Reflection
https://www.freecodecamp.org/news/how-to-build-a-self-learning-rag-system-with-knowledge-reflection/
Published: April 24, 2026 20:52
Every RAG system I've seen — including the one I wrote a handbook about on this site — has the same fundamental problem. It doesn't learn. You ingest 500 documents. You ask a question. The system retr
How to Trace Multi-Agent AI Swarms with Jaeger v2
https://www.freecodecamp.org/news/multi-agent-ai-swarms-tracing/
Published: April 23, 2026 23:41
When you run a single AI agent, debugging is straightforward. You read the log, you see what happened. When you run five agents in a swarm, each spawning its own tool calls and producing its own outpu
How I Tested Malaysia's Open Data Portals with Plain English
https://www.freecodecamp.org/news/how-i-tested-malaysia-s-open-data-portals-with-plain-english/
Published: April 23, 2026 23:37
Most end-to-end test suites drive a real browser and click through an app like a user. They check whether a page renders and whether elements appear. But they don't check whether the numbers on those
How I Built a Production-Ready CI/CD Pipeline for a Monorepo-Based Microservices System with Jenkins, Docker Compose, and Traefik
Published: April 23, 2026 18:11
This tutorial is a complete, real-world guide to building a production-ready CI/CD pipeline using Jenkins, Docker Compose, and Traefik on a single Linux server. You’ll learn how to expose services on
The Hidden Tax of Infrastructure: Why Your Team Shouldn’t Be Running It Anymore
Published: April 23, 2026 17:05
Most engineering teams don't set out to manage infrastructure. They start with a product idea, a customer need, or a business problem. Infrastructure enters the picture as a means to an end. Servers n
From Metrics to Meaning: How PaaS Helps Developers Understand Production
Published: April 23, 2026 16:52
Modern production systems generate more data than most developers can realistically process. Every request emits logs. Every service exports metrics. Every dependency introduces another layer of signa
From Symptoms to Root Cause: How to Use the 5 Whys Technique
https://www.freecodecamp.org/news/from-symptoms-to-root-cause-how-to-use-the-5-whys-technique/
Published: April 23, 2026 16:48
Most teams don't struggle because they can't fix problems. They struggle because they fix the wrong thing. An API fails in production. You restart the service, errors go away, and it feels resolved. U
Product Experimentation for AI Rollouts: Why A/B Testing Breaks and How Difference-in-Differences in Python Fixes It
https://www.freecodecamp.org/news/why-ab-testing-breaks-in-ai-rollouts-and-how-to-fix-it/
Published: April 22, 2026 22:33
Your team shipped an LLM-based summaries feature to wave 1 workspaces at week 20 and now the post-launch doc is due. You need a causal effect number, a specific estimate you can defend to a statistici
How to Create a GPU-Optimized Machine Image with HashiCorp Packer on GCP
Published: April 22, 2026 20:30
Every time you spin up GPU infrastructure, you do the same thing: install CUDA drivers, DCGM, apply OS‑level GPU tuning, and fight dependency issues. Same old ritual every single time, wasting expensi
3D Web Development with Blender and Three.js
https://www.freecodecamp.org/news/3d-web-development-with-blender-and-three-js/
Published: April 22, 2026 20:13
Take your creative web development to the next level by building an interactive 3D cozy cafe portfolio from scratch using Blender and Three.js. We just posted a course on the freeCodeCamp YouTube chan
How to Fix a Failing GitHub PR: Debugging CI, Lint Errors, and Build Errors Step by Step
https://www.freecodecamp.org/news/how-to-fix-failing-github-pr-ci-lint-build-errors/
Published: April 22, 2026 17:19
While many guides explain how to set up Continuous Integration pipelines, not very many show you how to debug them when things go wrong across multiple layers. This is a common experience when contrib
How to Merge PDF Files in the Browser Using JavaScript (Step-by-Step)
https://www.freecodecamp.org/news/merge-pdf-files-using-javascript/
Published: April 22, 2026 16:36
Working with PDFs is something almost every developer needs to know how to do. Sometimes you need to combine reports or invoices, or simply merge multiple documents into a single clean file. Most tool
How to Handle Stripe Webhooks Reliably with Background Jobs
https://www.freecodecamp.org/news/stripe-webhooks-background-jobs/
Published: April 22, 2026 16:03
You've set up Stripe. Checkout works. Customers can pay. But what happens after payment? The webhook handler is where most payment integrations silently break. Your server crashes halfway through gran