ZATCA Tax API Integration for Perfex CRM

I need a full-stack developer to integrate the ZATCA tax API into Perfex CRM. This integration is crucial for ensuring compliance with Saudi Arabian tax regulations.

The integration should work with the following modules:
- Invoices
- Estimates
- Expenses

The following features need to be automated:
- Tax calculation
- Tax report generation
- E-invoicing compliance

Additionally, all existing data in Perfex CRM needs to be synchronized with the ZATCA API.

Ideal Skills and Experience:
- Proficiency in Perfex CRM and ZATCA API
- Strong background in full-stack development
- Experience with tax automation systems
- Data synchronization expertise

Looking for someone who can deliver this project efficiently and accurately.