Does it affect future employment?

What you're asking is whether having tattoos on your legs will affect your employment. Does not affect.

Tattoos have no effect on general work, as long as they are not in a conspicuous position. But tattoos are not allowed in some positions, such as soldiers, government workers, public officials, teachers, doctors and so on. As for some relatively ordinary enterprises and companies, they generally don't have a full-body examination before recruiting people, so as long as they don't expose their tattoos in a high profile, they generally won't affect job hunting.