It depends on the company. One place I worked at instituted a bonus system with the result that programs were released on time, buggy or not, as releasing them late would have reduced the managers' bonuses. I raised a stink about that by repeatedly saying "We really must inspect the code before the product ships." I was sidelined and let go early when the company shrank to a shadow of its former self, infested by people who were more interested in furthering their career than doing the job.

The next company I worked at was very serious about quality. When I started working there, I was told that I was allowed one bug in my code. If there were a second one, I would be fired. I'm not sure if that was true as my code didn't have any (found) bugs. It was thoroughly inspected by two senior engineers before I could even run it on the test bench. We were some months behind schedule but there was not one word about reducing the quality to catch up.

The first company made communications equipment, the second one an air traffic control system.