5 Angular Micro Frontend Architecture Mistakes That Surface Only in Production

A developer with years of experience building Angular Micro Frontends on a large government platform has outlined five critical architecture mistakes that typically go undetected during local development and code reviews. Key pitfalls include mismanaging shared dependencies, where version mismatches between remotes can cause silent failures or broken singletons at runtime. Authentication is another common failure point, as multiple remotes each handling their own token logic can trigger refresh races and incomplete logouts. Routing conflicts also emerge in production when remotes register overlapping or out-of-namespace routes, causing 404 errors on deep links and unpredictable browser navigation. The author recommends treating shared singletons as versioned contracts, centralizing auth in the shell, and establishing clear routing namespaces early to prevent these issues from reaching users.