What is Code Review?

Code review means a colleague examines your code before it goes live. Just as a piece of writing often improves when someone else reads it before publication, code improves when a second person looks it over. It saves you from embarrassing mistakes and your app from crashing.

Think of it as four eyes instead of two on an important delivery. The person who wrote the code is often too close to spot errors — like missing your own typos in an email you just sent. A fresh pair of eyes catches what you missed, asks questions and suggests better approaches.

Code review is not about judging the person. It is a normal, built-in step in how professional teams work. It often happens via a pull request, where changes are presented clearly so the reviewer can see exactly what is proposed.

Why does code review matter for your business?

Code review improves quality and reduces risk. Bugs caught before release never hit your customers, and fixing problems early is always cheaper than cleaning up after something breaks in production.

It also spreads knowledge through the team. When several people understand the code, the business becomes less fragile — you are not dependent on a single developer knowing how everything fits together. That is reassurance for you as the client.

Code review in practice

Say a ZORC developer builds a new file upload feature for a client's system. Before it goes live, they submit the changes for a colleague to review.

The reviewer spots that the feature would allow file types that could pose a security risk. It is fixed immediately, before the code reaches the customer. Without code review, that issue might only surface when something went wrong in production — now it never became a problem.