More Than Just Bug Hunting
Code review (CR) is the practice of having one or more engineers read and evaluate another engineer's proposed changes before those changes are merged into the shared codebase. Think of it like a second set of eyes before you send an important email — a chance to catch mistakes, improve clarity, and make sure everyone is aligned.
Many engineers view CR purely as a technical gatekeeping process: "Find the bugs so we don't break production." That is a legitimate goal, but it is only half the picture. CR is also the primary mechanism by which engineering teams communicate standards, mentor junior engineers, share context across the codebase, and build (or destroy) trust. A toxic code review culture — where reviewers are harsh, pedantic, or slow — can erode a team's morale faster than any technical debt.
The stakes are real. Research from Google's internal engineering effectiveness studies found that the tone of code review feedback directly correlated with whether engineers felt psychologically safe enough to take risks and propose improvements. Teams with hostile review cultures saw engineers submit smaller, safer PRs — not because the code was better, but because the engineers were afraid of criticism.
The Golden Rule of CR:
Review the code, not the person.
Your goal is not to prove you are smarter than the author. Your goal is to help the author land high-quality code. The mental model is: "We are on the same team, working against the problem together." The author is not your adversary. The bug is.
Interviewers at companies like Google, Meta, and Stripe often ask: "Describe your ideal code review process." A weak answer focuses only on catching bugs. A strong answer covers both the technical dimension (correctness, performance, security) and the social dimension (tone, labeling, timeliness, mentorship). Mention that you use automated tooling to handle style so human reviewers can focus on logic and design.