Ho Do I Develop Netlify Apps For My Website?

I want To Develop Web App Using Netlify For This Website https://www.fastjobsearchers.com/

@nasir730263 Welcome to the Netlify community.

If you don’t know how to develop your web app, it’s not fair to ask others to do the work for free. Perhaps you should hire a developer, because there is no way a question as complex as this can be answered in a help forum such as this.