Meta Frontend Engineer Interview Questions

I would keep the visible list stable, load new content incrementally, and avoid blocking the main thread with expensive rendering work. I would also use skeleton states, virtualization where needed, and careful memoization so the feed remains responsive during updates.

I would think about input latency, emoji and mention handling, autosave, draft recovery, and accessibility. I would also make sure the editor state stays predictable so formatting, cursor position, and async validation do not fight each other.

I would update the UI immediately when the action is low risk, then reconcile with the server response. To keep it safe, I would design a rollback path, handle conflict cases, and avoid optimistic updates for actions where correctness matters more than speed.

I would profile first to find whether the issue is rendering, layout, scripting, or network related. Then I would reduce unnecessary state propagation, split heavy components, virtualize long lists, and move expensive work off the critical interaction path.

I would make the components easy to adopt, well documented, and consistent across teams. If the API is awkward or the defaults are poor, people will bypass it, so I would focus on usability, accessibility, and real product workflow fit.