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The gap between a demo that impresses and a system you can trust is measured in evals. I want to start with a story that's happening in hundreds of engineering teams right now. A team builds a RAG app ...

Systems design has always been treated as a backend problem. Ask a group of Flutter engineers what systems design means, and most will describe server architecture: load balancers, databases, and micr ...

Static sites are having a moment, and it makes sense. A folder of HTML, CSS, and JavaScript files is fast to load, cheap to host, and very hard to break. Tools like Astro, Eleventy, and Hugo build tha ...

You've spent two weeks building an AI assistant. The streaming chat looks beautiful, the system prompt is tight, and safety filters are configured. You demoed it to the team, and everyone was impresse ...

When a workflow has more permissions than it needs, a simple build job can become a path to repository changes, token misuse, or a wider blast radius than the team intended. The problem is easy to mis ...

Reading PDF documents for long periods can become tiring, especially when the document contains bright backgrounds or when you're working in a low-light environment. In other situations, designers, de ...

If you've ever built a web application or configured Spring Security, you've almost certainly encountered Cross-Site Request Forgery (CSRF). In my previous guide, How OAuth 2.0 Works: A Practical Guid ...

I still remember the first time I ran a Bell-state circuit on a quantum simulator. The code was only a few lines long, but it felt magical. Two qubits became entangled, and the simulator returned almo ...

For decades, recording an electrocardiogram (ECG) meant visiting a hospital or clinic. The doctors would place multiple electrodes on your chest and limbs to capture your heart's electrical activity.

In this tutorial, I'll show you how to fine-tune a large language model for use in AI agents using supervised fine-tuning with QLoRA. This lets us customize a pre-trained model so it behaves the way w ...