adjust shipping rates and settings for ecommerce site

I am looking for an experienced e-commerce developer to adjust the shipping rates and settings for my WooCommerce site. The ideal candidate should have expertise in WooCommerce and be familiar with configuring shipping options.

Requirements:
- Familiarity with WooCommerce platform
- Ability to adjust shipping rates based on weight and location
- Experience in configuring shipping settings for all countries/regions
-Familiarity with Stamps.com interaction with WooCommerce

Specifics:
- The shipping rates should be adjusted based on both weight and location.
- All countries/regions should be included for shipping adjustments.
-The Customer Should be charged the cost of shipping plus 15% to cover packaging labor and materials

Please provide examples of previous work and any relevant certifications.