Shopify Sticky Buttons Implementation

Shopify Developer Needed – Sticky Add to Cart & Buy Now Buttons

I need a Shopify developer to add a sticky bottom bar on my product pages similar to the Portronics website.

Reference:
Sticky “Add to Cart” and “Buy It Now” buttons fixed at the bottom of the screen while scrolling on mobile devices.

Requirements:

* Add a sticky bottom bar on all product pages.
* Include two buttons:
* Add to Cart
* Buy It Now
* Buttons should remain visible while the user scrolls.
* Must be fully responsive on mobile devices.
* Should match my website design and branding.
* Existing Add to Cart functionality must continue working.
* Buy It Now button must work with my current FlexiPay checkout integration.
* No impact on website speed or existing functionality.
* Clean code implementation without installing unnecessary apps.

Website Platform:
Shopify

Important:
Please mention if you have done similar Shopify sticky cart implementations before.

When applying, please provide:

1. Similar work examples
2. Estimated completion time
3. Total cost
4. Whether any app installation is required

Looking for someone who can complete this quickly and professionally.