Software Engineer.
I find funky titles superflous and unnecessary. It would be ridiculous if other professions adopted this too. For example, imagine a limo driver calling himself 'captain of a chartered car'. Plain titles give you a general idea of what the person does. In general, Sofware Developer II/Senior Developer has greater responsibility than Softare Developer I etc. I think people will find it difficult to differentiate between a hacker and software ninja. Really, what is the difference?