Explain your work so a senior engineer trusts your judgment

Strong engineers lose interviews by describing what they built instead of why. The interviewer already assumes you can write code. What they are testing is judgment: did you understand the problem, did you weigh the options, and do you own the outcome.

Use a four part structure. State the problem and the constraint that made it hard. Name the options you considered. Explain the choice you made and the tradeoff you accepted. Then say what you would change now that you have seen it run.

The last part matters most. Saying what you would do differently signals that you learn from production, not just from the plan. It turns a story about a feature into a story about your growth.

Practice this out loud on a real project until it takes ninety seconds. Ninety seconds of clear reasoning beats five minutes of narration every time.