ERPNEXT upgrade and ZCATA Integration for E-Invoicing

I'm looking for developer who can do upgrade and integrating ERPNEXT with ZCATA as part of the second phase of our project, specifically focusing on e-invoicing.

Key Responsibilities:
- Upgrade ERPNEXT
- Move the server from one hosting company to another one taking all the data and files
- Integrate ERPNEXT with ZCATA
- Focus on e-invoicing integration

Ideal Skills:
- Experience with ERPNEXT and ZCATA
- Knowledge of e-invoicing systems
- Integration expertise