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15 Hours Lost: How Poor Docs and No Setup Scripts Hurt Junior Mobile Devs

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A developer onboarded two junior engineers onto a React Native Expo project last week and logged every friction point they encountered. Both developers had web React experience but no mobile background, and each lost roughly 15 hours to avoidable setup and documentation failures. Common blockers included Node version mismatches, missing Xcode tools, misconfigured Android SDK paths, and confusion between Expo Go, dev builds, and EAS builds — none of which were addressed in the README. Undocumented auth patterns caused one developer to rebuild a token-refresh mechanism that was already running silently in middleware. The author concludes that a single setup script and a few focused documentation pages could have prevented nearly all of the lost time.

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