You don't need good developers as in top quartile genius ones. Even more, they don't want to work at your bank or web shop. You need good developers, where good means "decent human beings" while being just average ib talent. Those can be found without gigantic effort, I'd say a majority of developers fall in this category. There is only one hard requirement for recruiting such average team. To hire and retain developers who are "decent human beings" the manager/hr should also be good, as in "decent human beings".