My own opinion - If you can't write code for the frontend OR the backend then it's not the frontend / backend part that is a problem with your title, it's the developer bit....
And that's not meant to be a criticism of anyone - if you are a good programmer you _can_ write frontend OR backend code in any language - maybe you just haven't done it yet. So why is it part of your job title? At best it should be in the prior experience section of your CV.
Code is code. At the end of the day it's all 1s and 0s. Don't limit yourself.