This is pretty cool, though it seems more beneficial as a neat demo project than for its actual functionality. First, automated job application submission probably doesn’t endear you to hiring managers. And, moreover, you probably don’t want to optimize your life for job hunting in the same way that you probably don’t want to optimize your life for being very good at first dates. Life is more fulfilling if you can find what you want and keep it for the long run.
It also feels like it's optimizing for the wrong thing (getting past the screening for as many job as possible, regardless of fit). I personally felt like the most successful experience I had with job search (and retention) is if I knew someone at the company and just bypassed the initial resume screening altogether and hand-crafted a nuanced resume and cover letter with a strong backing from people that knew me.
I realize not everyone has that luxury but I made diligent effort to network in and out of work and it has mostly helped me filter out bad jobs/fit and save time for both parties.
