Here is something else to consider. Your application goes to HR. They are going to put you into the system (because how else will you get a paycheck?), who the hell is Ryan with social security number xxx-xx-xxx?
You can't do it man, for certain not with a professional job.
Your resume needs to match your application. On your application you will most likely (in the U.S.), be signing something that says what you wrote was "true and correct", or some such ->-bleeped-<-.
Currently, I live as "female" at work. I wear all men's clothes and always have. I wear a dress shirt and dress pants. All I do is skip the tie (for now). They treat and interact with me as a guy, and always have. Go to your interview dressed in that, maybe with a suit jacket. They will know they are getting a very masculine person if they hire you, so it will be no big deal when you tell them on your first day that you go by Ryan and that you are transitioning. They may already assume you might be transitioning at the interview. But, again, best choice is to get all you papers changed first, and then go look for work.