Online Marketer

Person required for SEO, SEM and social media marketing for online store(s).
We are soon to launch a store on Shopify (fulfilled via dropshipping from Aliexpress). The store primarily sells affordable fashion for females in their late teens / early 20s.
We have someone setting up the Shopify store and supply chain and now require someone who can market it for us.
We need someone with experience in SEO, SEM, social media marketing and other channels that can be used to optimise sales.
Must know which tools and applications are required for this and need little direction.