I don't like applying the term Engineer with something that isn't practiced as an engineering discipline... Software development is usually an exercise as a craft discipline.
Aside from that, if you aren't writing a fair amount of code I wouldn't use the term developer, or would consider it a very jr position... what you are would be a senior web designer with some development skills. And there is nothing wrong with that.... working mock ups and demos are really helpful, and often all that is needed if it's mostly static or stand alone.
Just my $0.84 (inflation, you know)
Michael J. Ryan
Alpha Geek