Interview prep
Software Engineer Interview Questions & How to Answer Them
8 questions you're likely to get for a software engineer role, with a tip on what actually makes a strong answer.
Question 1
Walk me through how you'd design a URL shortener.
Focus on requirements clarification, data model, and scaling considerations - interviewers want your reasoning process, not a memorized answer.
Question 2
Tell me about a time you disagreed with a technical decision.
Show you can advocate for your position with data while still committing to the team's final call.
Question 3
How do you approach debugging a production issue you've never seen before?
Narrate a structured process - reproduce, isolate, check logs/metrics, form a hypothesis - rather than jumping to a guess.
Question 4
What's a project you're proud of, and what would you do differently?
Pick something with real tradeoffs, not just a win - self-awareness reads better than a flawless story.
Question 5
How do you review someone else's code, and how do you handle feedback on yours?
Show that you focus on correctness, clarity and risk, and that you take feedback on your own work without defensiveness.
Question 6
Tell me about a time you improved the performance or reliability of a system.
Measure before and after, name the bottleneck and describe the change. A number and a cause are what make the story credible.
Question 7
How do you decide what to test, and how to test it?
Show a risk-based approach: unit tests for logic, integration tests where systems meet, and what you choose not to test and why.
Question 8
How would you handle technical debt in a codebase when deadlines are tight?
Show that you make the debt visible, fix it in small steps alongside feature work and explain its cost in business terms.
Get the resume right first
A strong software engineer resume is what gets you into the interview in the first place.
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