Cross-Platform Productivity App Development

I'm looking for a skilled full-stack developer to create a productivity tools mobile application for both iOS and Android platforms.

Key Requirements:
- Experience in developing cross-platform mobile applications.
- Proficiency in relevant programming languages and frameworks (React Native, Flutter, etc.).
- Strong backend development skills to support app functionality.
- Previous work on productivity or similar category apps is a plus.
- Ability to integrate user-friendly interfaces and robust features.

Ideal Skills:
- Mobile app development
- Backend development
- UI/UX design principles
- Experience with databases and APIs
- Problem-solving and communication skills

Please share your portfolio and relevant experience. Looking forward to your proposals!