I just got a job at Old Navy-- second job to supplement the income, pay the mortgage and all that kind of jazz. Supposed to start on Thursday. Hope I haven't jinxed it by telling everyone.
Anyway, I filled out the application with my male name, but my cell phone, dress, presentation, everything else is Jessica. The phone conversation was a little interesting when we were setting up the first interview:
Him: So we'll see you Thursday at 5:30 for the interview.
Me: Sounds great. Ummm, there's something that you might want to note on my application.
Him: What's that?
Me: [male name] is my legal name. I don't use it for anything really and I go by Jessica all the time.
Him: [male name] is your legal name.... (you could hear him wrapping his head around it)
Me: yes
Him: but you go by Jessica.... (it was starting to click)
Me: that's right.

Him: You go by Jessica.... but [male name] is your legal name. (He finally had it)
Me: yes. I'm getting my name changed soon, so it shouldn't be a problem.

(I was smiling and trying to convey happiness and confidence, it makes my voice sound cheerier I think).
I feel bad doing this to people, outing myself when I pay with a credit card or something like that, because I feel like it's a borderline mean practical joke. The problem is, if you put a name down on a job application that isn't your legal name, they can fire you or not hire you in the first place for putting false information on a job app. Or so I've heard from people that do hiring and firing for small-ish retail stores-- Starbucks managers, etc. YMMV. So I had to use my male name because I don't have my name change finished yet.
It was tough. There's a lot of places that won't hire visibly trans people even if their hiring policies don't discriminate on gender identity or expression. Part of it is being in the right place at the right time, part of it is confidence, and part of it is finding people who don't let things like being trans get in the way of hiring good people. I ended up applying to like 10 places, and Old Navy was the only one that called me back.