IntermediateSITUATIONAL
You deploy a release and receive reports that a key form layout is broken in a subset of older browsers and on mobile, but the feature must remain live; how do you triage, communicate with stakeholders, implement a temporary mitigation, and plan a permanent fix?
Frontend Developer
General

Sample Answer

When I rolled out a signup flow at my last company, 8% of sessions (mostly older Android WebViews and IE11 users) reported a broken form layout. I first triaged by reproducing on device farm and in BrowserStack within 90 minutes, capturing screenshots and a minimal failing CSS case. I alerted PMs and support with severity, affected % (8%), and a 24-hour mitigation plan. For a quick mitigation I shipped a CSS fallback (flex-to-block and reduced selectors) behind a kill-switch so the feature stayed live and errors dropped by 70% within 6 hours. Parallel to that I scoped a permanent fix: refactor layout to resilient grid/flex patterns, add automated cross-browser visual tests, and schedule the rollout over two sprints with QA and accessibility sign-off.

Keywords

Reproduce quickly on BrowserStack/device farm and quantify impact (e.g., 8% sessions).Communicate clear status and mitigation timeline to PMs/support.Ship a reversible CSS fallback behind a kill-switch to reduce errors fast.Plan permanent refactor plus automated cross-browser visual tests.