[actsasbuffoon]

I wouldn't worry. I don't even have a Bachelor's and I make a six figure salary as a developer. If I can manage it without a degree, then you should be fine with a PhD!

I know a few developers with degrees in pure and/or applied mathematics. Without exception they're extremely smart people who are very good at what they do. I doubt you'll have difficulty finding a good job.

[cnp]

Same here. But what I did have was real projects to show for and an ongoing interest in languages. The degree question was never an issue.

Like the above comments suggest, get a github account together that clearly outlines your interests.