Hi Silva,
I seen your requirement and we also had some discussion on Hangout.
And i also send the request your colleague Zafar.
I seen your both attached files like- Presentation in Technical Requirements for the Plugin and Technical Requirements
And after that i assure to complete your work with the good look and feel.
You want - The plugin must be in the form of a custom post type
The Library will allow for multiple custom fields (text)
The Library will also allow for Categories and sub Categories
The Library will be loaded via a short code
The Library will allow for filtering based off the categories and also allow for free text searching for text fields
The Library will contain articles that will be classified using the custom fields and categories
yes i am very much expertise with HTML,jhoomla,magento,drupal ,wordpress,oscommerce development.
We make the right use of modern technologies like PHP, ASP.net, Ajax, Flash, Flex, Cold fusion etc. and high quality of creativity
As per matching your need please take a look on my past work :
[login to view URL] (Responsive)
[login to view URL] (Responsive)
[login to view URL] (Responsive)
[login to view URL] (Responsive)
[login to view URL] ( Woo commerce)
Thanks
OP