I would interpret that as somebody working on ML algorithms and architectures, not somebody developing a product that uses some form of AI at runtime...
I haven't seen this sort of work called AI Developer yet, but I may have missed the trend shift. Isn't the convention for this still to use the title of Machine Learning Engineer (MLE)?
There is another thread here that seems to confirm it's me who has missed a trend shift. I didn't know this term had a special meaning. I just followed the thought that an x-developer is somebody developing x.