Create SharePoint 2013 app, that will realize special form for upload file group to SharePoint library.
App type: SharePoint-hosted
Display type: all screen app
Data sources: external SharePoint 2013 list and libraries
More detail specification by link: [url removed, login to view]
6 freelancers are bidding on average $402 for this job
I have 5+ years of experience working with SharePoint. Here is an example of previous project i've been invloved: http://www.ceibal.edu.uy I can assure you'll be satisfied with the end product.