Client Management Application Development

I require a skilled web and mobile application developer to create comprehensive client management software. The application's primary purpose is to manage clients and their work requests.

Features Needed:
- User registration and login: Clients should have their individual profiles to track their work.
- Integration with existing CRM system: The software should efficiently integrate with our current CRM system.
- Email verification and notifications: Verify client credentials and send notifications accordingly.
- Task management: Assign and manage tasks responding to various client work requests.
- File uploads and sharing: Integrate a system for easy file uploads and sharing.
- Messaging system: Clients should be able to communicate their work requests clearly.

Ideal skills and experience:
- Proficient in web and mobile application development
- Comprehensive understanding of CRM systems
- Mastery in developing secure user login and verification systems
- Proven proficiency in creating well-streamlined task management features
- Experience in creating efficient file sharing protocols
- Quality experience in developing clear and clutter-free messaging systems.