Shopify - modifications on existing site

Closed - This job posting has been filled and work has been completed.

Job Description

I have created a shopify ecommerce site.

For the moment, I need to add a few functionalities:

- create a scrolling menu on the main menu bar to select a sub-category
- create a functionality that allows users to select products according to price range
- Modify shipping requirements: I need to be able to configure shipping location (products can be sent from anywhere in the world, to anywhere in the world). This will also be linked to taxes and shipping rates.

Thanks in advance,