React native developer required Urgent

We already have video playback working in our Expo-based React Native app. The goal of this feature is to *optimize the video feed for low-end devices and slow internet*, similar to Threads or TikTok.

Optimizing FlashList so scrolling remains smooth with multiple videos
Reworking video delivery so videos load in *small chunks (≈2 seconds)* instead of downloading full files
Improving autoplay logic so only visible videos play, reducing memory and CPU usage
Making backend changes (Django + S3) to support efficient streaming (HLS or range-based chunks)

The result should be a *highly optimized, smooth, production-ready video feed* that works reliably even on weak devices and networks.

This task is priced *per feature*, and future features will be handled separately.