Connect Existing Price Simulator to WooCommerce personalised Checkout with Payment Integration -- 3

I’m looking for a skilled WordPress/WooCommerce developer to finalize and connect a working flow between my custom price simulator and my custom 4-step checkout page, with direct payment via a fully installed payment gateway.

What’s Already Done:
- The price simulator (HTML/JS) is fully developed.

- The custom 4-step checkout page is already built.

- The payment gateway API is correctly installed and ready.

What Needs to Be Done:
Embed the simulator on the homepage of the website.

When a user uses the simulator and gets a final price:

This total must be sent directly to the custom checkout page (bypassing the WooCommerce cart).

The custom checkout should:

Display the correct price passed from the simulator.

Complete the payment using the existing payment gateway.

Ensure the WooCommerce order is created correctly and payment is processed without errors.

Requirements:
Strong experience with WordPress + WooCommerce custom flows

Skilled in frontend-to-backend integration (HTML/JS → WooCommerce PHP)

Experience with custom checkout pages and API-based payments

Ability to bypass default cart behavior and ensure smooth flow: Simulator → Checkout → Payment

This is a straightforward integration task for someone who knows WordPress deeply. All core components are already developed — I just need someone to connect the flow and make it work smoothly.

Please send examples of similar work you’ve done.