Answering with respect my previous employers
1- It is full time and done by someone with significant IT experience from a previous job (relating to working on cabin crew touchpads etc) ... a couple of support roles are by pilots and that's it.
2- I don't think many know how much their coworkers are paid but if i was to hazard a guess i'd say about 45-50k.
3- It's a Mon-Fri 9-5 job
4- To make sure everything goes smoothly with setting up devices for incoming pilots (lots of work involved with fetching passwords, logins etc), sending out notifications to pilots whenever updates are made either through company apps or by the manufacturer (apple, samsung etc), dealing with day to day queries by pilots ("my screen won't load and i've a flight in 10 mins" etc etc), keeping track of all the devices on a day to day basis (internet usage etc), dealing with the network provider too (vodafone, O2 or whoever)... these sorts of tasks.