Customize Odoo POS Receipt Layout

I am looking for a skilled developer to customize my Odoo POS receipt layout. The current receipt only shows details of the current transaction. I want to modify it to include the customer's total outstanding balance, specifically for unpaid invoices.

Key Requirements:
- Modify the tax receipt layout in Odoo POS.
- Display the customer's total outstanding balance for unpaid invoices.
- Ensure the balance is presented in a numeric format.

Ideal Skills and Experience:
- Experience with Odoo POS customization.
- Strong understanding of Odoo's receipt layout and reporting.
- Proficiency in Python and XML for Odoo development.
- Attention to detail to ensure accurate display of financial information.

If you have the expertise to implement these changes, I would love to hear from you.