Android Productivity App Development

I'm in need of an Android app focused on enhancing productivity through task management. The app should enable users to manage tasks efficiently, and most importantly, collaborate with other users on shared tasks.

Key Features:
- Task Management: The app should have an intuitive interface for users to create, manage, and track their tasks.
- User Collaboration: A core feature of this app is to facilitate collaboration among users. This could be in the form of shared tasks, team projects, or group discussions.

Ideal Skills:
- Proficiency in Android app development is a must.
- Experience in creating productivity apps will be a significant advantage.
- Knowledge of implementing collaboration features in apps will be highly regarded.

Please bid only if you have relevant experience and can deliver a high-quality app.