How does code review work?

Code review is the process of having other developers check code before it is merged into the main branch. The goal is to improve the code's quality, security, and readability, not just to "catch errors".

#Main stages of code review

1. Creating a pull request (PR) The developer finishes the task, makes a commit, and opens a PR in the repository (for example, on GitHub, GitLab, Bitbucket). The description states the purpose of the changes, the related task, and the list of files and tests.
2. Reviewers review the code One or more colleagues read the changes line by line. They check:

• correctness of the logic,
• readability and style,
• presence of tests,
• impact on performance and security,
• adherence to architectural principles.

3. Comments and discussion Reviewers leave comments directly in the code. The author discusses them, makes fixes, or explains decisions. This is a key moment for exchanging knowledge and aligning standards.
4. Fixes and re-review After the fixes, the author updates the PR, and reviewers look at the changes again.
5. Approval and merge When everyone agrees, reviewers give "approve", and the code is merged into the main branch (often after automated tests).

#Goals and value

• Improving code quality and stability.
• Early detection of errors and architectural problems.
• Knowledge sharing between developers.
• Consistent standards and approaches in the project.

#Conclusion

Code review is not control, it is a collective defense of product quality. A good review does not slow down development; it makes the team stronger, the code more reliable, and the knowledge shared.