I have received the same email from this company.
The selection process costs you 950 euros plus travel to and from the assessment location and any food and accommodation charges while you are there.
If you pass the selection (tech paper, interview and sim check) you will enter their pool of crew to be recommended to airlines if the airline approaches them (they are an agency) and you fit the candidate profile (age, gender, nationality, flying hours etc) that the airline want.
So the job is not already there but you will be ready if a suitable position comes up (assuming you pass the selection).