Required software development,Website Development freelancer for Desktop site redirect to subdomain for mobile/tablet users job

I have a old style desktop site that we are currently working on converting to Wordpress.
Our site is hosted and they used to have a proprietary program to create a mobile site, which we used (Mobile Site Creation Tool). This tool created a mobile friendly site and redirected all mobile/tablet traffic to a subdomain. They discontinued the product (deleted the subdomain site) and replaced it with an new tool Website Builder. This tool creates responsive websites that will automatically scale to the device. I have created a new temporary site using this new tool into that same subdomain. Unfortunately the mobile traffic is not automatically redirected to this site and google sees the main website as NOT mobile friendly. I need someone to fix this, so all the mobile traffic goes to the subdomain like it did before. When we get the new site finished we will get rid of the subdomain as the new site is going to be in Wordpress and scale for all screen sizes.

Skills & Expertise Required

software development Website Development