As previous posters have alluded to but not come right out and said, it was possible to escape from Azkaban before. Granted, it was practically impossible to break out, but Sirius and Barty Crouch, Jr., did manage to do so. In the former case, it require a very advanced magical skill, and in the latter case it required outside help. As
originally posted by vatsan17
We know that after the second war, Dementors were removed from Azkaban by Kingsley. So I am assuming Azkaban would be guarded by some Aurors.
Will it be possible for a captured Death Eater to escape from Azkaban now?
This sounds likely to me. Perhaps one of the first jobs an Auror might have after training would be guarding Azkaban. After the Auror gains more experience, then s/he would get to move onto more exciting tasks.
originally posted by The Cursed Quill
I like to think of Aurors as being leveled. Like they all go through mandatory training such as, Disguise and Concealment, but some people are higher up with more difficult jobs than others.