IntermediateLEADERSHIP
As a mid-level engineer mentoring juniors, how would you set up and enforce code review practices and CI checks for an Android project to improve code quality and prevent regressions without slowing feature delivery?
Android Developer
General

Sample Answer

On my last Android team of eight, I introduced a lightweight code-review and CI guardrail that balanced quality with speed. I defined a two-tier review: small UX/bug PRs get one reviewer and a 24-hour SLA; architectural or >500-line PRs require two reviewers and a short design note. On CI we added fast unit test suites, Kotlin lint, detekt, and instrumentation smoke tests, and only ran slow end-to-end tests on merge to main. We enforced a 70% coverage floor on new modules and automatic flaky-test quarantining. Within three months we cut post-release regressions by 45% while keeping mean time-to-merge at ~6 hours. I paired juniors with seniors on reviews to teach patterns and reduce rework.

Keywords

Two-tier review policy with SLAs to avoid bottlenecksCI pipeline split: fast checks on PR, slow/full tests on mergeCoverage thresholds for new code and flaky-test handlingMentor pairing during reviews to onboard juniors
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