There is a difference. The difference between someone who works as a programmer, who takes it just as a job but of course can be extremely good at it - just like anything else you practice a lot; and someone who is a programmer. They are lexically the same but they mean different things. The last one, beside working (or not) as a programmer, does it for the art of it. Who not necessarily learns or does something (ships) because it's needed or it provides anything else beside the joy and fulfilment of learning and understanding it. For example, at work, when you want to stop programming you open your own personal open source project and relax for an hour with it. Then you go home after 8 hours of programming and start up your IDE and carry on with your art that may or may not ever see the light of day and it makes no difference.