Software Developer Interview Questions (Canada)

What to expect

Software Developer interviews in Canada (NOC 21232) typically run 4 stages: recruiter screen, technical phone screen, take-home or pair-programming, and an onsite loop with system design and behavioural. Be ready to discuss trade-offs, on-call experience, and a recent shipped project in detail.

See the matching NOC 21232 guide, the resume example, and the cover letter example.

Behavioural questions

1. Tell me about yourself.
2. Why do you want to work here?
3. Tell me about a time you handled a difficult coworker.
4. Describe a time you had to meet a tight deadline.
5. Tell me about a mistake you made at work and what you learned.
6. Walk me through a time you had to learn something new quickly.
7. Describe a situation where you had to push back on a stakeholder.

Software Developer-specific questions

1. Walk me through a recent project you shipped end-to-end.
2. Design a URL shortener.
3. How would you reduce p95 latency on a slow API endpoint?
4. What's your testing philosophy — unit, integration, E2E?
5. Tell me about a production incident you owned.
6. When do you reach for a database index vs a cache?
7. How do you handle code review disagreements?

Culture-fit questions

1. Where do you see yourself in 3 years?
2. What's your salary expectation?
3. Why are you leaving your current role?
4. How do you handle feedback?
5. What's your preferred working style — independent or team-based?
6. Do you have questions for us?

STAR-method sample answer

Question: Tell me about a time you improved system performance.

Situation. Our analytics dashboard at Hootsuite had a p95 page-load of 2.4s, hurting weekly retention.

Task. Cut p95 below 1.5s without a full rewrite, and ship within one quarter.

Action. I migrated the dashboard from Backbone to React 18 with RTK Query, partitioned a 4 TB Postgres events table by month, and added a CDN layer for static segments.

Result. p95 dropped to 1.1s, weekly retention on the dashboard rose 6%, and the partitioning playbook was adopted by two other teams.

Smart questions to ask back

1. What does success look like in the first 90 days?
2. Who would I be working with day-to-day, and how is the team structured?
3. What's the biggest challenge facing this team right now?
4. How is performance measured and reviewed?
5. What do you enjoy most about working here?

Related guides

• STAR interview method
• Common interview questions Canada
• When to follow up after applying