A step-by-step guide to containerising a FastAPI application with Docker and deploying it to the cloud for consistent, production-ready delivery. Modern applications rarely live in isolation. They move between laptops, staging servers, and production environments. Each environment has its own quirks, missing libraries, or slightly different configurations. This is where many “works on my machine” […]
Daily Archives: February 7, 2026
In the world of big data, performance isn’t just about bigger clusters – it’s about smarter code. Spark is deceptively simple to write but notoriously difficult to optimize, because what you write isn’t what Spark executes. Between your transformations and actual computation lies an invisible translation layer – the logical plan – that determines whether […]
Feature flags are powerful tools that let you control which features are visible to users without deploying new code. They enable gradual rollouts, A/B testing, and instant feature toggles, which are all essential for modern software development. In this article, we’ll build a real, production-ready feature flag system, not just a simple boolean toggle. Specifically, […]
Your UI doesn’t “randomly” refuse to update. In most cases, it’s rendering cached data, which is data that was saved somewhere so the app doesn’t have to do the same work again. Caching is great for performance, but it becomes a pain when you don’t realize which layer is reusing old data. If you’ve ever […]
Harvard University’s CS50 is one of the most popular beginner computer science courses in the world. We just released the entire 25-hour CS50 course on the freeCodeCamp.org YouTube channel. This is the most recent version updated for 2026, with an all-new section about the impact of artificial intelligence on computer science. David J. Malan is […]