Multi-School SaaS Platform Development

I'm seeking an experienced developer to launch a multi-school SaaS platform using open-source school ERP software.

The platform must support multiple schools and include essential features for each school. The key functionalities required are:

- Attendance tracking
- Grading system
- Scheduling and timetables

Ideal Skills and Experience:
- Proficiency in developing SaaS platforms
- Experience with open-source school ERP software
- Strong background in building multi-tenant systems
- Knowledge of attendance, grading, and scheduling modules

Please provide relevant past work examples.