Comprehensive School Management Software Needed

I'm in need of a skilled software developer who can create a comprehensive school management software. This software should cater to our institution's needs and requirements.

Key Features:
- Attendance Tracking
- Gradebook Management
- Student Information System
- Student Registration
- Monthly Fee Ledger
- Income & Expenses
- Payroll
- Punching System Linking to Software

User Base:
The software will be used by more than 500 students and staff members. It's crucial for the software to be scalable and able to accommodate a large number of users.

Cross-Device Compatibility:
The school management software should be accessible on both desktops and mobile devices. It's essential that users can access the software on the go from different devices.

Ideal Skills:
- Proficiency in developing school management software
- Experience in creating secure and scalable software
- Knowledge in integrating payroll, income/expenses, and other relevant features
- Ability to create a user-friendly interface
- Prior experience in designing software that is compatible with both desktops and mobile devices