E-commerce specialist

We are a US-based start-up importing and commercializing premium mineral water. Our first water, Socosani Mineral Water had recently been listed in Amazon and we are looking to boost sales.
The candidate must be proficient in Amazon Seller Central, Walmart.com, Paypal, Shopify, and Woocommerce. Work will start with Amazon and needs to be an expert on PPC campaigns, SEO, and connect social media to Amazon.
Potential additional tasks: Social media (Instagram, Facebook, Linkedin), virtual assistant. This can turn a job into fulltime
Previous experience with consumer products, non-alcoholic beverages highly valued.