Describe open-source contribution experience
Company: IBM
Role: Software Engineer
Category: Behavioral & Leadership
Difficulty: medium
Interview Round: Online Assessment
##### Question
What is your experience contributing to open-source projects? Walk the interviewer through your background in detail, covering:
1. **Projects and repositories** — Which open-source projects have you contributed to? Name the notable repositories, what they do, your role (contributor, reviewer, co-maintainer), the timeframe, and the scope of your involvement.
2. **Specific contributions** — What did you actually do (code, design proposals, bug fixes, performance work, tests, docs, CI/release management)?
3. **Most impactful contributions** — Which contributions had the biggest effect, and can you quantify the impact (PRs merged, performance delta, reliability, CI time, adoption, security)?
4. **Collaboration with maintainers and community** — How did you work with maintainers and other contributors through issues, code reviews, RFCs/design proposals, and async discussion? How did you handle backward compatibility and versioning?
5. **Evidence** — Can you point to concrete artifacts (PR/issue numbers, release notes, benchmarks, RFC links) that back up your claims?
6. **Key learnings** — What did you learn from participating in code reviews and issue triage that you would apply in a professional engineering team?
Overview: This IBM software-engineer take-home behavioral question evaluates your open-source contribution experience end to end: the projects and repositories you worked on, your specific roles and most impactful contributions, how you collaborated with maintainers through issues, code reviews, and RFCs, and the lessons you took from code reviews and issue triage. A strong answer goes deep on one or two repositories with quantified, evidence-backed impact.