Amazon Frontend Engineer Interview Questions

I would use feature flags to decouple deployment from release, but I would also make sure flag logic stays maintainable. That means clean defaults, safe fallbacks, and monitoring so the team can detect issues quickly when a flag is enabled.

I would protect the user-facing risk areas and simplify scope where possible. The best balance is usually to ship the essential flow with high confidence and defer polish or secondary features that do not affect the core value.

I would support localization from the start, avoid hardcoded layouts that break with longer text, and test behavior on slower devices and varied network conditions. The product should remain usable and legible across the environments customers actually have.

I would compare bundle sizes, caching behavior, image assets, third-party scripts, and real user network conditions. Development builds often hide the exact costs that show up once the app is deployed at scale.

I would rely on standards first, add polyfills only where needed, and test the actual browsers and device classes that matter most. Compatibility work should be driven by the user base, not by trying to support every possible environment equally.