Cross-Platform Mobile App Development

I need an experienced mobile app developer to create an app for both iOS and Android platforms and also a website like job hai .

Requirements:
- Cross-platform compatibility
- User-friendly interface
- Secure and scalable backend
- Integration with third-party APIs
- Regular updates and maintenance

Ideal Skills:
- Proficiency in React Native or Flutter
- Strong knowledge of UI/UX design principles
- Experience with Firebase or AWS
- Ability to provide detailed project proposals

Please include a detailed project proposal in your application.