PrestaShop Upgrade and Customization

I'm looking for an experienced web developer to upgrade my PrestaShop from version 1.7.5 to 8.1. My current PrestaShop website has various customizations and plugins installed, all of which should be V8 compliant.

1 click upgrade has been tried and fails

Customizations and Plugins include:

- Payment gateways
- Shipping method plugins
- Theme customizations
- Price
- Search
- Import

Ideal skills for the job include:

- Experience with PrestaShop
- Familiarity with Payment gateways, Shipping method plugins, and Theme customizations
- Proficiency in PHP, HTML, CSS, and JavaScript
- Experience with website performance optimization
- Understanding of effective UI/UX design