Shopify Shipping Module Development

I'm seeking an experienced Shopify developer to create a simple module that determines the correct shipping carton size based on cart contents. We have three available box sizes and an existing Excel file that maps products to compatible box sizes.

Requirements:
- Build a Shopify module using the provided Excel file
- Ensure accurate determination of shipping carton size based on cart contents

Ideal Skills:
- Proficiency in Shopify development
- Experience working with Excel data integration
- Strong problem-solving skills
- Attention to detail

Please provide a portfolio showcasing relevant work.