Most systems don’t start out needing CQRS. They start simple: create, update, list, dashboard. Everything in one place. Everything reasonable. Until read requirements slowly begin to reshape the system, often in subtle ways 🧩. In this week’s video, I show how that happens using a FastAPI app backed by MongoDB, and how Command Query Responsibility Segregation (CQRS) provides a clean way out once reads and writes want very different things. Along the way, I cover: separating command intent from...

Code can be correct and still be unpleasant to read. A lot of software design isn’t about what the code does but about how clearly it communicates the sequence of ideas behind it. In this week’s video, I explore the Fluent Interface pattern by refactoring a small animation engine in Python. I start with a clunky but functional API, then gradually reshape it until defining an animation reads almost like a sentence: move, rotate, scale, fade. Enjoy this deep dive into API design, readability,...

Have you ever looked at a Python script and thought: “Why is this slow? The logic is trivial.” Very often, the problem isn’t what your code does, but how often it does expensive work. In this week’s video, I start with a deliberately inefficient example: parsing a large CSV file multiple times. From there, I use it as a vehicle to introduce 10 powerful Python features that many developers either don’t know about or don’t know when to apply. I look at things like: • caching expensive...