Amazon Payment Integration

I looking for some one what is able to add a new Payment Method to my Website:

At the moment i have Paypal and Coupon Code.

Next step is to add Amazon Payment:

* The Website is based on Codeigniter
* I need some one with Javascript skills and CSS
* Backend come from me i need only your information what you need
* You have experience with Amazon Payment and i mean not add it to your Wordpress website!
* You have also experience with PHP
* Amazon Payment IDK is already installed trough composer
* Amazon Payment widget is also already availeble and added but only the basic code.

For what i not look:
* you don't read the basic requirement and tell me then later the money is to low
* This work you can be done in 30 minutes if you are good.