Required CRM,CSS,HTML,javascript,MySQL Administration freelancer for Development of a GED module job

We use a homemade CRM build upon the MVC framework Codeigniter v3. Technologies
involved are Php 7, MySQL, javascript, HTML and CSS. We added an HMVC add-on to
structure the code in modules. Currently our application has more than 200 modules and more
than 300 database tables. We use GIT in our development process.
We want to add an Electronic Document Management module to our CRM. This module shall
allow us:
1) to add an electronic document to the repository, storing it on the disk and associating it
with several property values,
2) to find a document by submitting some property values,
3) to manage a simple lifecycle of the documents.
We started a development for that but it was halted before the end. We don't know if
something can be reused from it.

Skills & Expertise Required

CRM CSS HTML javascript MySQL Administration