Are you allowed to publish papers while working at Amazon?

Hi All,

My friend will be interviewing with Amazon, Seattle for the position of Applied Scientist. She is about to finish her phd and is very much interested to pursue her career doing research in the field of ML/AI. She was wondering if there are any teams doing fundamental research in ML/AI at Amazon or if all the work done is revolving their products? Also, do they publish any of their research? I mean, are they even allowed to publish?

Thank you all in advance!