Ecommerce Products SEO Optimization

My business is looking for help with SEO optimization for our ecommerce products. We'd like to find an experienced freelancer who can perform both on-page and off-page optimization for our products. The majority of our traffic comes from Amazon, Etsy, Wallmart, Google and Bing. We already have a content plan for optimized product descriptions, but need help implementing it to really get the most out of our SEO. We need someone who has the right combination of skills, creativity and experience to help us increase our search rankings to the top!