Hello,
I have read your job details and here I would like to confirm you that I will surely help you to upgrade your Magento website to latest 1.x version, Install all missing patchs and test and check for bugs and make it works properly and provide you longterm help as per your requirements. Please share your current Mageno website URL also confirm which version currently you are using.
As I am Magento developer and I have extensive expertise in Magento 1&2 Store Development, HTML5/CSS3/ JavaScript, CSV&XML Products Uploading, Extension Development, 3rd Party Gateway/App/Plugin/Script Integration, PSD to Magento Conversion and Theme Development. I have worked with Magento Enterprise, Open Cart, Prestashop, Zen Cart Magento Go and Magento Community edition(s).
Looking forward to a cheerful response.
Regards,
Manu