3rd party testing of website

I’m in process of having website built
I need someone to test it .
The logins, checkouts, backends, inventory, invoices, speed test, mobile friendly, messaging, chats, check site mapping, etc .
Must make a list of what needs to be fixed if not working or improvement needed.
Simple checking of site before I finalise with my current developer
Woocommerce site
Standard e-commerce site