How to Survive Your First Code Review as a Junior Developer

Your first code review junior developer moment is not the moment you find out whether you are good enough. It is the moment you find out how the team actually works, what the unwritten rules are, and how feedback gets shaped here. This guide walks through what happens during a typical first code review, what the comments actually mean, and how to respond in a way that builds trust instead of burning out. You will leave knowing what to read first, what to push back on, and what to silently fix without making it a thing.

I still remember sitting at my desk in week three of my first software job, watching the GitHub tab refresh itself every thirty seconds. My pull request had eighteen comments on it. My senior dev was five rooms away. My stomach was in my throat. I thought I had broken something fundamental.

I had not. I had just received my first code review, and I had no idea what any of it meant.

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What Actually Happens in Your First Code Review Junior Developer Reality

A code review is just a conversation about your code. It is not an audit. It is not a grade. It is not a referendum on whether you should be employed. The reviewer is reading your pull request, asking questions, and suggesting changes, the same way an editor reads a draft.

At most companies, the workflow looks roughly the same. You open a pull request on GitHub, GitLab, or Bitbucket. You assign one or two reviewers. They leave inline comments on specific lines, plus a top level summary. You either resolve the comments by editing the code, or you reply explaining why you would rather not. Eventually someone clicks Approve, and the code merges.

The hardest part of your first code review is realizing that nobody told you any of this out loud. The norms live in the team's heads.

The Comment Types Every Junior Software Engineer Should Recognize

Senior engineers leave roughly five flavors of comments. Learning to tell them apart will save you so much time and so much anxiety.

Nit. Short for nitpick. The reviewer is flagging something tiny, like a variable name or a missing newline. They are not blocking your PR. They are just telling you they noticed. Fix it if it is fast, otherwise reply "will address in followup" and move on.

Question. They are asking you to explain why you did something a particular way. This is not a trap. Sometimes seniors genuinely do not know your context. A short, direct answer is the right move.

Suggestion. They have a different way of doing this. Read it carefully. If you understand and agree, apply it. If you understand and disagree, say so respectfully.

Concern. Something looks off, possibly a bug, possibly a missing edge case, possibly a security issue. Treat these with attention. Even if the reviewer is wrong, they have spotted something that confused them, which means it might confuse the next reader too.

Block. They will not approve until this changes. These are the comments you must address before merge.

If a comment is unlabeled, default to treating it as a Question. Ask, do not assume.

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The First 24 Hours After a Code Review

The single most useful habit I learned in my first year is to wait at least twenty minutes after a review lands before responding. I read it. I close the tab. I make tea. I let the spike of adrenaline settle.

Then I come back, read it again, and only then begin replying. This sounds dramatic for what is essentially a Slack ping with line comments attached. It is not dramatic. The first read is the panic read. The second read is the actual read. They almost always say different things.

A junior dev I mentored called this her "second cup rule." Never reply to a code review on the first cup of coffee. It saved her from at least one passive aggressive thread.

How to Respond Without Sounding Defensive

Tone is the part nobody teaches you. Most junior developers either over apologize ("oh my god so sorry, fixing right now!!") or get a little prickly ("but the spec said..."). Neither helps you long term.

The safest response template is: acknowledge, clarify if needed, commit to action. Something like "Good catch, I missed the null case. Pushing a fix now." Or, if you disagree, "I went with this approach because of X. Open to changing it if you still think Y is better, can you say more?"

Notice what is missing. There is no apology spiral. There is no defensiveness. You are treating the review as collaboration, not judgment.

For more on tone in technical communication, the Google engineering practices guide for reviewers is the gold standard read. Their developer guide for code reviews is equally worth bookmarking.

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What Senior Engineers Actually Want to See

I once asked a staff engineer at a fintech company in San Francisco what she looked for in a junior's pull request. Her answer surprised me. She said she was not really looking at the code. She was looking at three things.

One, did the PR description explain why the change exists. Two, did the tests actually cover the new behavior. Three, did the code look like it was written for the next person to read, not just for the machine to run.

That is it. The actual algorithm matters less than you think. What matters is whether you understood the problem well enough to explain it.

If you are not sure how to write a strong PR description, start with three lines. The problem this solves. The approach you took. Anything reviewers should pay extra attention to. That structure alone puts you ahead of half of the engineers I have ever reviewed.

The Quiet Confidence Move That Changed Everything

About six months into my first job, I started doing something small that changed how seniors saw me. After every code review, I would write a short note in my own notebook. One thing I learned. One thing I would do differently next time. One thing I disagreed with and why.

I never showed anyone. The point was not external. The point was to make sure I was actually metabolizing the feedback instead of just reacting to it. Within a few months, I noticed my reviews getting shorter. Not because seniors were going easier on me. Because I was making fewer of the same mistakes.

That is the quiet promotion nobody tells you about.

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Key Takeaways for Your First Code Review as a Junior Developer

• A code review is a conversation, not a verdict. Treat reviewer comments as collaboration, not judgment.
• Learn to recognize nits, questions, suggestions, concerns, and blockers. Each one calls for a different response.
• Wait at least twenty minutes before replying to a review. The first read is panic, the second is real.
• Use the response template: acknowledge, clarify, commit to action. Skip the apology spiral.
• Write strong PR descriptions: problem, approach, things to watch. That structure alone puts you ahead.

FAQ

How long should my first code review take to address?

For a typical PR with five to fifteen comments, plan for half a day to a full day, including a buffer. Rushing fixes is how you create new bugs. If your team is asking for same hour turnarounds, that is a process issue, not a you issue.

What if I disagree with a senior's feedback?

Disagree, respectfully and with reasons. Senior engineers expect this. The phrase that works is "I went with X because of Y. Happy to switch if there is a tradeoff I am missing." That gives them a hook to either explain or yield.

Should I respond to every single comment?

Yes. Even if it is just a thumbs up emoji or a "fixed in commit abc123." Silence on a comment reads as "I am ignoring you." Acknowledgment closes the loop.

What if my first code review has more than thirty comments?

That probably means your PR is too big. Break future PRs into smaller, single concern changes of two hundred lines or fewer. The research on PR size consistently shows shorter PRs get better reviews and faster merges.

How do I stop feeling so anxious about code reviews?

Time and reps. By your fifth or sixth review, the dread fades. The body learns this is not a threat. If it does not fade, that may be a sign of a culture issue, not a skill issue.

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If this resonated, you might also enjoy my earlier post on what I wish I had known about code reviews as a junior woman in tech. And if you have ever felt like the only one in the room, this one is for you: the day I stopped counting women in the room. There is also how I stopped apologizing on Slack as a woman in tech.

What was your first code review like? Did anything here sound familiar? Drop a comment below, I would love to hear your stories. Especially the ones that turned out fine.