Staff Frontend System Design

Staff frontend interviews are not harder trivia — they test judgment under ambiguity, org-scale trade-offs, and how you evolve systems over years without breaking teams.

You are expected to present multiple valid architectures, explain migration paths, define operational guardrails (SLOs, rollbacks, feature flags), and reason about team boundaries — not just pick React and draw boxes.

This module extends RADIO with Operations, Team/org constraints, and Evolution (RADIO+OTE), then walks through capstones: frontend platform for dozens of teams, real-time collaboration, and monolith-to-MFE migrations.

Prerequisite: complete Frontend System Design (RADIO basics) and Micro Frontends before this module — staff rounds assume you already know rendering, caching, and state at senior depth.