It is not "unprofessional". I'm a professional developer and when an employer asks me what I can do for them I don't consider it unprofessional. Likewise, when

It is not "unprofessional". I'm a professional developer and when an employer asks me what I can do for them I don't consider it unprofessional. Likewise, when I ask an employer what they can do for me, it isn't "unprofessional". To think otherwise is to lose sight of the fact that this is a business arrangement; a value for value exchange. Asking the counter party what they are trading for your labor is a "big warning flag" to an employer only if they didn't want a fair exchange of value i.e. "Sorry, we're looking for someone more exploitable."