Odoo 19 Document Customization

My team relies on Odoo 19 SaaS to run every part of our China-based sourcing and trading operation. I need the Sales, Invoicing and Approval documents re-worked so they look professional, match our branding and still flow through the native Odoo workflow without a hitch... (Budget: ₹1500 - ₹12500 INR, Jobs: Branding, ERP, Invoicing, Odoo, PHP, Python, Sales Management, Software Architecture, Software Development, XML)