Subcontractor Work Order ERP

I am looking for a developer to create a web-based ERP module dedicated to subcontractor work order management. Here's the specific architecture and requirements:

**Key Architecture:**
- **Frontend:** HTML, CSS, JavaScript (responsive interface).
- **Backend:** PHP.
- **Database:** MySQL.
- **Files:** Project-specific document/photo storage.
- **Reports:** PDF and Excel generation.
- **Notifications:** Start with email notifications, with plans to integrate WhatsApp API later.

**Core Functions:**
• Simple and clean interface for work order creation and assignment, including deadlines, statuses, and cost fields.
• Robust reporting and analytics allowing filter by date range, subcontractor, or project with export options (PDF/Excel).

**Deliverables Include:**
1. Fully functional source code and database schema.
2. Deployment guide to set up on my server efficiently.
3. A user guide explaining how to add, assign, and generate reports on work orders effectively.

Developers comfortable with this stack and having experience in building similar systems are encouraged to apply. Clean code and documentation with user-friendly design will be key deciding factors.