I applied online. The process took 2 weeks. I interviewed at TP (Athens, Athens, Attica) in Sept 2017
Interview
Consists of 2 phases, one as a phone screening and one with the top manager of the department to decide on your employment and department.
Mostly very basic questions following a certain pattern, certain questions even. Nothing to worry about so long as you have decent English and common sense.
Interview questions [1]
Question 1
How would you describe a modem to an elder person on the phone?