freeCodeCamp

How to Build a Production-Ready DevSecOps Platform from Homelab to AWS [Full Book]

Osomudeya Zudonu |
In this book, you'll build a fintech transaction ledger from scratch and progressively transform it into a production-ready DevSecOps platform. You'll also deploy it on AWS. The app processes credit a... read more

The ETL Pipeline Handbook: How to Build a Production-Grade Pipeline in Python

brooklyn |
Tracking flood risk takes one unglamorous but essential thing: clean and structured data. In this tutorial, you'll build a data pipeline yourself. You'll create a Python ETL (Extract, Transform, Load)... read more

How to Build a Real-Time Object Detection and Tracking Pipeline with ROS 2 and YOLOv11

Iyanuoluwa Enoch Oke |
If you've ever tried to build a robotics system that can actually see, track, and respond to the world around it, you know that the hard part isn't training a detection model. The hard part is making... read more

How to Diagnose Production Bugs When You Can't Reproduce Them Locally

Manish Shivanandhan |
Every developer eventually encounters the same frustrating problem. A customer reports that your application is failing in production. You try the exact same workflow on your development machine, but... read more

How to Build a Browser-Based PDF Blur Tool Using JavaScript

Bhavin Sheth |
Many PDF documents contain information that shouldn't be shared publicly. Personal details, financial figures, signatures, addresses, account numbers, employee information, or confidential business da... read more

How to Use Prompt Engineering and Context Engineering for AI Agents

Darsh Shah |
In this tutorial, I’ll show you how prompt engineering and context engineering can improve an AI agent's performance. We’ll build a simple local agent, start with a baseline input, then improve it wit... read more

What to Do if You've Outgrown Your Cron Job Scheduler

Rob Walters |
Most developers begin their automation journey similarly. They create a script that performs a helpful task, such as pulling data from an API, resizing a batch of images, or emailing a report, and the... read more

How to Build an AI Agent with Function Calling in Node.js Using Google Gemini

Zia Ullah |
Last year, a client asked me to add a conversational interface to their internal reporting tool. Staff would type a question, and the system would pull a live answer from the database. I had the first... read more

The New Agency Stack: How Dev Shops Use Claude, Cursor, and Copilot in Production

Manish Shivanandhan |
Two years ago, AI coding tools were a curiosity. Agencies let junior devs experiment with them on internal tools and side projects, the kind of work where nothing broke if the code was bad. Client wor... read more

Firestore Data Modeling Guide: Embedded Documents vs Referencing (with a Blog Case Study)

Caleb Mintoumba |
When developers transition from the relational world (MySQL, PostgreSQL) to Firestore, Firebase's NoSQL document database, they often bring their old habits with them. They try to replicate tables, fo... read more