Shopify Development

I need an experienced shopify developer/designer to perform the following services:

- Creation of a megamenu per collection. Each collection will have a specific megamenu

- Fixed some layout issues

- Add filters on the Collections page

- Contact page content must be customized in shopify customizer

- Add new session on products page

- Create a differentiated display for the Blog page

- Add Klaviyo review widget to product page

*Shopify is at version 2.0 and the current theme is Dawn version 7.0.0