Dear Client,
Do you want this email alert on the whole library or list or on individual entity within that library or list?
Kindly provide more details so as to come up with same level of understanding.
I can surely help you to set up this out of the box feature as I am an experienced SharePoint developer having 5+ years of experience revolving around SharePoint Development (2016/2013/2010/2007), office 365, Custom Web parts, Workflows (State Machine & Sequential), Timer Jobs, Event Receivers, Feature deployment and Packaging, SharePoint Designer, SharePoint Branding, SharePoint Master Page Development, HTML, SharePoint InfoPath Development and External Content Type-BCS.
I request you to initiate the PMB quickly so that I can share more details with you that will help you decide whether you should award me for this project or not.
Awaiting for your positive response!
Regards,
Amit Master