Then they’ll get their lawyers involved to fuck you over. Since you probably coded it on company time with company equipment, they own everything and can sue you if you put booby traps in it. Hell there have been contracts in tech that say that everything you code while employed, regardless of whether it’s related to the business or not, they can claim, whether that extent is enforcible is another question but just the mere fact that plenty of companies are brazen enough to try that shit speaks for how much they expect to get away with, and they’re probably right.

Individuals rarely win against businesses as a design feature of capitalist society.