Technical Pilot
Generally a Tech Pilot is concerned with any interface between pilots and technology.
They are usually the company point-of-contact with equipment manufacturers and regulators for technical issues. A bread-and-butter duty is to sift through service bulletins and re-publish relevant information in company pilot notices. For example, they would publish a notice for something like an FMC update that changes PFD indications, but wouldn't bother telling you about a seamless FADEC software upgrade.
They usually also deal with wide technical-regulatory issues, such as PBN or FANS, and try to become the Flight Department expert on related subjects through plenty of reading, attending OEM events, talking to experts and having access to detailed background material. They tend to look after things that aren't a personnel issue but are not strictly engineering either.
It can be a fairly narrow secondary duty or a very widespread full-time job depending on the company. I imagine the Tech Pilots at QF are kept pretty busy, and going to semi-paperless flightdeck would be a classic Tech Pilot project.