Code Review Best Practices: How to Catch Bugs and Improve Code Quality

When you're working on software, code review, the process of examining someone else’s code before it’s merged into the main project. Also known as peer review, it’s not about finding fault—it’s about making the whole system stronger. A good code review catches bugs before they hit users, improves readability, and helps junior devs learn from seniors. But most teams do it wrong: they focus on indentation, miss logic errors, or turn it into a bottleneck. The best teams treat code review like a safety net—not a gatekeeper.

code quality, how clean, maintainable, and reliable the code is over time. It’s not about writing fancy algorithms. It’s about writing code your teammate can understand in five minutes. That means clear names, small functions, and comments that explain why—not what. code audits, systematic checks to find hidden risks like security holes or performance traps. These aren’t one-off tasks. They’re built into the workflow. Think of them like a mechanic checking your brakes every 5,000 miles. You don’t wait for the car to break down.

Good code reviews don’t take hours. They take focus. The top teams limit reviews to under 400 lines at a time. Anything bigger? Split it. They ask questions instead of giving orders. "Why did you choose this approach?" beats "This is wrong." They check for edge cases: What happens if the network drops? If the user types "NaN"? If the server returns 500? These are the bugs that crash apps in production.

And they don’t skip the human side. A review that says "This is messy" kills motivation. One that says "I got stuck here—can we make this clearer?" builds trust. The best reviewers leave specific suggestions: "Move this validation to the service layer," not "Fix this." They also say "Nice job" when something’s done well. Recognition sticks longer than criticism.

What you’ll find below isn’t theory. These are real posts from teams who’ve been burned by bad code reviews—and fixed them. You’ll see how a zero-fee exchange like Zeddex almost crashed because no one reviewed its liquidity logic. How Monsoon Finance’s privacy bridge avoided exploits because every line was checked by two engineers. How Thailand’s crypto tax rules were coded wrong in a startup’s system until a simple review caught it. You’ll learn what to look for, what to ignore, and how to make reviews faster, safer, and actually useful.