Best Virtual Assistant for Online eCommerce Seller

Hi,
I am a Business woman who just got started in eCommerce, I am looking for an experienced Virtual Assistant.
I am an online retailer mainly selling on Amazon.com

I am looking for someone with adequate knowledge of Amazon.com and Shopify.com
Jobs needed include:
1-using Syndication software such as syndwire and get content using spin rewriter
2-Posting on Facebook and Twitter daily using content software provided.
3-setting up email auto responder series in mail chimp
4-product set up on different channels
5-Follow up with other freelancers.
and other duties provided as needed.