Variations Expert with Facebook, Instagram, Etsy, eBay Stores connected to Big Commerce

I have 22,000 items in my store and Facebook is always changing something daily I need to update my items, so my store shows items in stock and not out of stock. I need someone efficient and familiar with all the above-mentioned platforms. That can go in and make super-fast changes that are asked for so that I can continue to show items in stock and move products.