Software Engineer interview questions
Software engineering interviews mix behavioural questions about how you work on a team with technical questions about systems, code quality, and trade-offs. Below are the questions that come up most often across product companies, startups, and larger orgs. Read them, rehearse your own examples, then paste your target job description into the free tool to get the exact set a specific posting is likely to ask.
Behavioral
- Tell me about a production incident you were responsible for. What broke, how did you find it, and what did you change afterward?
- Describe a time you disagreed with a senior engineer on a technical decision. How did it resolve?
- Walk me through a project you're proud of — your specific contribution, not the team's.
Role-specific
- How do you decide when to write a test versus ship and iterate?
- How do you approach reviewing someone else's pull request?
- When have you chosen to take on technical debt deliberately, and how did you track paying it down?
Technical
- Design a URL shortener. Walk me through the data model, the read/write path, and how it scales.
- How would you debug a service whose p99 latency suddenly doubled with no deploy?
- Explain the difference between optimistic and pessimistic locking, and when you'd reach for each.
Culture & motivation
- Why this company, and why this team specifically?
- What does a great engineering culture look like to you?
Want the questions for your exact job — with answers?
The list above is the common set for Software Engineer roles. Paste the job description you're actually applying to and the free tool generates the questions that specific posting is likely to ask. Then adapt your CV to that job to unlock full answers grounded in your own experience — so you walk in ready, not rehearsing generic lines.
Software Engineer interview FAQ
What are the most common software engineer interview questions?
Expect a mix: behavioural questions about incidents, disagreements, and past projects; a system-design problem (e.g. design a URL shortener); a debugging scenario; and culture-fit questions about why this team. Interviewers want a specific example, not a general philosophy — use the STAR structure (Situation, Task, Action, Result).
How should I answer a system design question in a software engineer interview?
Clarify requirements and scale first, sketch the data model and read/write paths, then talk trade-offs out loud (consistency vs. availability, cost vs. latency). Interviewers score your reasoning process more than the 'right' architecture.
How do I prepare answers tailored to a specific software engineer job?
Paste the job description into AdaptMyCV's free Interview Questions tool to get questions tuned to that exact role and seniority. To unlock full answers grounded in your own CV, adapt your CV to the job.