Rebuild and Enhance Mobile Application (Asaas)

Mobile App Developer / Team Needed – iOS & Android

I’m looking for an experienced developer or development team to rebuild our existing mobile app for iOS and Android, making it as close as possible to our existing website in terms of design, appearance, colours, functionality, and user experience.

Website: https://asaas.solutions/ (mobile web to be the source of truth)
Current Android app: https://play.google.com/store/apps/details?id=com.asaas.mobile1

What we have
Full source code for the website
Existing mobile app source code
Existing backend/API
Our own cloud/server infrastructure
The website is built with React
The original app used Supabase, but the backend has since been moved to our own server
What we need

The developer/team will be responsible for:

Rebuilding the app for both iOS and Android
Replicating the website's functionality and design as closely as possible
Integrating with our current backend/API
Reviewing and reusing existing code where appropriate
Fixing any existing issues
Testing on real iOS and Android devices
Delivering production-ready apps
Handling App Store and Google Play submission

Technology is completely open. We are not requiring React Native, Flutter, or any specific framework. You should recommend the technology/architecture you believe is best for achieving the best performance, quality, maintainability, and user experience.

We are looking for someone who can take full responsibility for the final product, rather than simply making minor changes to the existing app.

When applying, please provide:
Examples of similar apps you have developed
Links to apps you have published
Your recommended technology and why
Estimated timeframe
Estimated cost
Confirmation that you can handle the complete development and App Store/Google Play submission process

The website will be the main reference/source of truth for the mobile app's design and functionality.