Create your own SaaS or consult/freelance. Or if it's too stressful or not lucrative enough, start another type of small business. The "big business with lots of employees" thing is a relatively new phenomenon. Most people used to be solo operators or part of a family business.

And if you prefer, employers who need engineers aren't going away. They're being temporarily deluded into thinking that they can get rid of their teams due to the AI hype, but I expect that to change as "vibe coded" software starts to fall apart.