IntermediateBEHAVIORAL
Describe a time you were responsible for both front-end and back-end delivery of a feature—how did you prioritize tasks, manage dependencies between the UI and API, and ensure timely deployment?
Full Stack Developer
General

Sample Answer

On a recent project for a B2B dashboard used by ~5,000 customers, I owned both the UI and API for a bulk-import feature. I started by splitting work into contracts: shape of API payloads, error codes, and UI states, then prioritized API endpoints and mock responses so the front-end team (two engineers) could parallel work. I set up automated contract tests with Pact and ran daily syncs to resolve mismatches within hours. I also introduced feature flags and CI gates; backend merged first with stubbed responses, front-end followed, then we flipped the flag. This reduced integration bugs by 80% and cut delivery time from six to three weeks, while keeping incident rate at zero during rollout.

Keywords

Define API-UI contracts early with mocksParallelize work using stubs and contract testsUse feature flags and CI to control deployment