For people who live outside the US, you may want to consider that "convicts" include random drug testing (medical marijuana, poppy seeds testing positive for opium, alcohol/diabetes issues, HIV) – and of course, sexual preference.

Yes, there are laws and court cases that should change the outcome, but that means a lawsuit.

In other words, US employment frequently comes with a lot of implicit assumptions about your lifestyle.

Edit to add: fortunately random drug tests aren't very common in the tech industry.