You can reply and interact on platforms from an RSS reader. All an RSS feed is is a list of links. When you click them, you go directly to the platform. When using on a mobile device, RSS readers will even open the app for you to reply or interact with posts.
The fediverse will never replace RSS feeds. They serve a totally different purpose.
I'd take this job posting down if you are the owner or working for the owner of this company. The expectations of that job are terrible. And I'm pretty sure some of those items in job requirements are actually illegal in the USA. You can't hire people to be slaves.