freeCodeCamp

If you’ve ever spent two days pulling data out of an APM tool just to answer “how many virtual users should I run in my load test?”, this tutorial is for you. By the end, you’ll know how to derive eve... read more

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

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

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

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

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

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

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

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

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