Cross-Platform Mobile App with Admin Portal

Before apply please check the budget then only bid . I wont go beyond my budget

I'm looking for a skilled developer to create a cross-platform mobile application for both iOS and Android. The app should include:

Core Functionality:
- User authentication and profiles
- Messaging feature
- Payment integration

Additionally, I need a web-based admin portal to manage the app's functionalities and user activities.

Ideal Skills and Experience:
- Experience in developing cross-platform mobile applications
- Strong background in implementing secure user authentication and messaging features
- Proficiency in integrating payment gateways
- Knowledge in building robust web-based admin portals
- Familiarity with both iOS and Android development environments

Please provide examples of your previous work related to this project. Looking forward to your proposals!