ISP Management System Development

I'm looking for an experienced developer to create an ISP management system tailored for ISP administrators. The system should include:

- Customer management
- Billing and payment processing
- Network monitoring and management

Ideal skills and experience:
- Strong background in developing management systems
- Experience with database management
- Familiarity with network monitoring tools
- Ability to create user-friendly interfaces for administrators

Please provide examples of similar work done.