Hi,
I have read your project description very carefully and you need to Magento 2 site to other Magentao 2 site product uploading. I am an expert product uploading on Shopify, woocommerc, Amazon and eBay. I have experience in PHP,Java, Android development,Html & css, Shopify ,Magento, WordPress, eCommerce website development.
Could you please inbox me more detail about this project
Regards,
Atik