Amazon expert

I run an e-commerce store selling leggings. I'd like to create Amazon listing for our products (currently 31 products). I'm looking for an Amazon expert that can help not only set up the Amazon listings but optimise them in a way that get them better ranked / relevantly searched. I would also like help in understanding the pricing structure, and how it works in selling in different markets, as ideally i'd like to be selling in the USA, UK, and EU. For the right candidate there is the scope to optimise & manage on an ongoing basis all the other sales channels we are already present in (ASOS, EBAY, WANELO etc)