Software designers use a lot of machinery. Software designers make a lot of money. Software designers have to do quality work. Software designers have to make a profit. Software designers work in a place that looks high-techy.
Software designers use bolts to build things.
One qualification is you need to have imagination. You need imagination to think up what you will create. Another qualification is you need to have dedication. Another qualification is you need to have education. You need education to operate the machines.