This hob role is not for freshers. You must understand the fact that here they are looking for people who can take care of the maintenance and development of solution and architect for the required platform. A fresher will not be able to do all the task without seeking help and they won't even know as what are the things required. So they ask for the professionals with 6+ years of experience.
Hope this was of some help and you got to know about this job profile.