If it's 'a good-paying job', a job that pays a lot, but might not be good, it is wrong, it should be 'a well-paid job'. If it's 'a good, paying, job', as in a

If it's 'a good-paying job', a job that pays a lot, but might not be good, it is wrong, it should be 'a well-paid job'. If it's 'a good, paying, job', as in a good job, one that pays, it's correct. Sometimes grammar is the difference between knowing your shit, and knowing you're shit.