Articles

API testing checks that your endpoints behave correctly: right status codes, response shape, and behavior under bad input. Below: what to test and how to do it in practice. Automated API tests catch regressions when you change backend code and serve as executable documentation. We'll go over status, body, errors, how to structure tests, and how to handle auth and test data.

Clean code is easy to read and change. It’s not about being clever; it’s about naming things well, keeping functions small, and reducing surprise. We'll sum up habits that help. Readable code is changed and debugged faster; when you or someone else returns to it later, clear names and small functions make the intent obvious without guessing. No performance or flexibility trade-off—just clearer code.

Productivity in development is less about speed and more about reducing friction: fewer context switches, clearer tasks, and tools that stay out of your way. We'll collect practical habits that actually stick. Small improvements—one task list, automation for repeated steps, and protected focus time—compound over time. All of it without buying new tools or working longer hours.

Environment variables are key-value pairs provided to your process by the OS or runtime. They’re the standard way to pass config and secrets without hardcoding. Below: how they work and how to use them safely. They keep configuration and secrets out of source code so you can change values per environment and avoid committing credentials. We'll cover how to set and read them, validate and document them, and make your app fail fast when something is missing.

Git tracks changes in your project and lets you collaborate through branches and merges. You don’t need to know every command—a small set covers most daily work. We'll stick to that set. Git is the standard for version control in software teams; knowing the basics (clone, add, commit, push, pull, branch, merge) is enough to collaborate and revert mistakes. Here are those commands and how to avoid common pitfalls like committing secrets or breaking shared history.

Web tokens are a way to carry identity or permissions in a string. The most common is JWT (JSON Web Token). Below: what they are and how they’re used in APIs and sessions. Tokens are stateless from the server's perspective: the server verifies the signature and reads the payload without looking up session storage. We'll cover how tokens work, when to use them, and how to avoid common mistakes like storing them insecurely or putting secrets in the payload.