Multi-platform React Native App Development

I'm seeking a seasoned React Native developer to assist in transforming my website into a robust multi-platform application. The ideal candidate should have a strong command of React, Next.js, and Supabase, with a compelling portfolio of mobile applications built using Expo.

Key Responsibilities:
- Accessing the original Next.js source code and converting it to functional React Native code.
- Retaining the styling and features of the existing web application during the conversion process.
- Optionally improving the code where necessary.

It's crucial for this project that all initial features from the web application are present in the new mobile app. The app's backend is powered by Supabase, so previous experience with this platform will be advantageous.

Please note, you will be working on a partially completed codebase, but you are welcome to start afresh, provided it doesn't hinder the project timeline. The app needs to be optimized for both iOS and Android platforms.

Essential Features to Retain:
- User authentication
- Real-time data updates
- Responsive design
- Anonymous mode
- Automated totals

There are no new features to be introduced that aren't currently part of the web application.