Advadvanced School Management System Development with android and ios

I'm looking for an experienced developer to create a comprehensive school management system with the following key functionalities:

- **Student Enrollment and Attendance Management**
- **Grade and Exam Management**
- **Teacher and Staff Management**

The system should have robust user access control for Admins, Teachers, Students, Parents, and Staff.

Additionally, it should include communication features like:
- Email notifications
- SMS alerts
- In-app messaging

Ideal Skills and Experience:
- Proven experience in developing management systems
- Strong knowledge of user access control mechanisms
- Expertise in integrating communication features
- Familiarity with educational software requirements

Please provide relevant portfolio and experience.