In April, the site revealed the existence of a new division, known only as 'Building 8' which is dedicated to creating ground-breaking products at the intersection of hardware, software, and content.
And a new job advert posting suggests that the mysterious division could be working on mind-reading technology.
Facebook posted the adverts on its job site, which can be accessed by the public.
One advert is for a 'brain-computer interface engineer' to work on a '2-year B8 project focused on developing advanced BCI technologies.'
Details on what the job will involve are limited, but the advert adds that one of the key responsibilities will be applying 'machine learning methods, including encoding and decoding models, to neuroimaging and electrophysiological data.'
The second advert is for a 'neural imaging engineer' who will be responsible for 'a project focused on developing novel non-invasive neuroimaging technologies.'