Strong Flutter/Dart experience, with shipped production apps- Solid understanding of mobile platform internals on iOS and/or Android- Experience with native photo/media APIs (PHAsset, MediaStore, or equivalent)- Comfort with async programming, isolates, and background processing patterns- Experience with native background APIs (BGProcessingTask, WorkManager, etc.)- Ability to work autonomously in a remote, async environment- Clear, thoughtful communication, written and async-first. - Building out the mobile app's capabilities to achieve feature parity with the web app- Deep integration with native photo libraries: PHAsset (iOS) and MediaStore (Android)- Background sync, upload pipelines, and memory-efficient media handling- iCloud and Google Photos interop, including managing remote vs.