Hi,
I just read your posting. Sounds like you need someone to take care of every aspect of an ecommerce for you.
I can help you handle the project from the beginning to the end which include the user interface/ user experience design, to the development and to the launching of the website.
Tell me, what is/are the product you want to sell to people around the world on this website? Do you have any ecommerce website you will love your workflow to follow? who are your Target audience?
I am sure you need someone competent with a lot of experience to help you handle this work.
let begin your work and get it done as soon as possible
Best regards,
Samuel.