Dear Client, How are you?
I have just read your job description in more details.
As I'm a senior Full stack developer, I have an expertise of Payment using Paypal, Stripe, Brain Tree, etc... and ecommerce etc..
And I have high skill in web site design.
So I can bring you perfect result as you want within short time.
Hope to discuss about your project more details over chat.
Looking forward to hearing from you.
Cheers.