Dear Concern,
Greetings of the day !!
From your Job description, I have understood that you need to changing the design on Shopify Theme.
-- Yes I am available for your work.
I am a professional Shopify developer, having extensive experience in Photoshop, Responsive HTML/CSS, Bootstrap, HTML5, PHP, CSS3, Experience with theme customization, plugin integration/development, Payment gateway integration, API & plugin development, Git.
For Cost & estimation : I would like to discuss on some of queries regarding your Job posting so that I can give you my best & exact quote.
So, Let's connect over next round of interview to know more about each other & specification of your project.
Thanks