Hi there,
I’ve carefully gone through your job posting. I can develop CSOM script for you to upload single or multiple files from local system to SharePoint library through web page.
Quick question:
Do you want to upload file to SharePoint online (Office 365 SharePoint) library or SharePoint 2013 ( On Premise) library?
I have 6+ year of experience with SharePoint (2001/2010/2013/2016) & Office 365 Developer.
Looking forward to working with you.
Thank you,
Hemant