BigCommerce Checkout Module Fix Needed

I'm in need of a BigCommerce (SaaS) expert to address issues with a custom checkout module on our Italian eCommerce platform in the pharmaceutical sector. The module, developed by a software company some time ago, is experiencing unspecified issues that require immediate attention. This project offers the potential for ongoing collaboration.

Key Requirements:
- Diagnose and resolve issues with the custom checkout module
- Ensure seamless functionality for multiple payment options
- Enable guest checkout capability
- Implement coupon code application feature

Ideal Skills and Experience:
- Proven expertise in BigCommerce platform, particularly in custom module development and troubleshooting
- Strong understanding of eCommerce checkout processes and user experience
- Experience in the pharmaceutical eCommerce sector is a plus
- Ability to work efficiently and communicate effectively to provide timely solutions

If you have the skills to enhance our checkout experience and are interested in a potential long-term partnership, I look forward to your proposal.