Hello Dear, I've read your project summary and I have went through the document you attached very carefully and I can enhance your website by adding the features you mentioned like sign-up and payment gateway as per your requirements and I am absolutely sure that I can do the project very well. Share with me further details related to the task so I can start working on it.
Lets have a quick chat to discuss further.
I have extensive experience in designing and development of Websites, Mobile Applications, Management Systems and E-commerce or Online Stores Solutions.
Kindly have a look at my Portfolio and Client's reviews via this link,
https://www.freelancer.com/u/kamran2012
Thanks,
Faizan