Cross-Platform Productivity App Development

I'm looking for an experienced mobile app developer to create a productivity tool for both iOS and Android platforms. The app should have core features like task management and note-taking.

Key Requirements:
- Cross-platform mobile app development (iOS and Android)
- Implementation of task management features
- Development of note-taking functionalities
- Prior experience in creating productivity apps will be a plus
- Proficiency in UI/UX design for smooth user experience

Please provide examples of your previous work in your proposal.