Hi,
I gone through the all 8 points you mentioned in project description. I understood your requirement of category page customisation and Cart add product functionality customisation.
The Concept pictures are not attached by you, as you mentioned it in description. Can you please provide concept pictures, so I can revert with any possible queries.
By the way, I already worked for you on 3 magento projects before too.
In Short About Me:: I am a professional web designer & PHP developer. I have command over languages PHP, CSS, XML, HTML, XHTML. e-Commerce platforms Magento, CRE Loaded And CMS solutions Word Press, Moodle, Joomla And DataBase platforms MySQL, SQL, PgSQL.
Also have knowledge Site Builders, Cgi, Apache, JSP, JAVA, Ajax, Asterisk, Voip, Perl, Shell Script.
Do not hesitate in contact me, I will be glad in participate in your project.
Regards,
MAX