What is a "front-end developer"?

I can do the literal translation, and I can surmise that it means a person who builds and designs UIs, but I always thought that was a designer, not a developer.

Javascript is the only thing on what you've just listed that's Turing complete, so look into Node.js, in addition to all the other Buzz Words you see in the rest of the comments.

I also think you should come at this with a dark sense of humor. You're not going to save many lives if you don't get attention, and you're not going to get anyone's attention if it's Just Another Web App. Tasteful gallows humor is a good way to grab the audience you're looking for.