Android Project Management App Development

I'm looking to develop an Android app designed to streamline project management. The app should facilitate:

- Task assignment and tracking
- Project timelines and milestones
- Team collaboration features (chat, file sharing)
- Progress reporting and analytics

Ideal candidates should have:

- Proven experience in Android app development
- Strong background in designing project management tools
- Ability to integrate collaboration features
- A portfolio showcasing similar past work

Please include relevant past work in your application.