What job would they have had if they hadn't been fighting for the Order? (and after the war)
I am not asking about their money (which was already addressed here: Where did Harry's parents get all of their money from?), and I know they were “Full Time Fighters” for the Order. I am focused on the jobs they would have had after the war.
I can’t remember if it is addressed anywhere and I’d be really interested in finding out.
Lily being one of “the brightest” witch he ever taught according to Slughorn I would find it hard to believe that she didn’t envision her future after the war and didn’t plan for her career. After all, Hermione did and she was even more of a “Full Time Fighter” since she even left school before her last year.
“Hmpf. Yes, well. You shouldn’t have favorites as a teacher, of course, but she was one of mine. Your mother,” Slughorn added, in answer to Harry’s questioning look. “Lily Evans. One of the brightest I ever taught. Vivacious, you know. Charming girl. I used to tell her she ought to have been in my House. Very cheeky answers I used to get back too.”
[...]
Slughorn looked down at him in surprise. “You mustn’t think I’m prejudiced!” he said. “No, no, no! Haven’t I just said your mother was one of my all-time favorite students? And there was Dirk Cresswell in the year after her too—now Head of the Goblin Liaison Office, of course—another Muggle-born, a very gifted student, and still gives me excellent inside information on the goings-on at Gringotts!”
Harry Potter and the Half-Blood Prince - Chapter 4 (Horace Slughorn)
Being in the SlugClub (and one of Slughorn favorites) I imagine Slughorn would have encouraged her to at least think about a possible career.
James wasn’t too dumb either, even if he was a bit too full of himself for a while.
“Well, I thought that paper was a piece of cake,” he heard Sirius say. “I’ll be surprised if I don’t get Outstanding on it at least.”
“Me too,” said James. He put his hand in his pocket and took out a struggling Golden Snitch.Harry Potter and the Order of the Phoenix - Chapter 28 (Snape's Worst Memory)
Granted he’s the one saying he’s good so that could only be his ego talking, but no one contradicts him which implies they think so too. Plus, becoming an animagus on his own before even taking his OWLs also points to some serious skills. Also, he started becoming more responsible in seventh year, and could have started thinking about it:
“She started going out with him in seventh year,” said Lupin.
“Once James had deflated his head a bit,” said Sirius.Harry Potter and the Order of the Phoenix - Chapter 29 (Careers Advice)
Additionally, all students apparently have to attend some kind of “career counselling” during their fifth year so they would have had to at least think about it.
All fifth years will be required to attend a short meeting with their Head of House during the first week of the Summer term, in which they will be given the opportunity to discuss their future careers. Times of individual appointments are listed below.
Harry Potter and the Order of the Phoenix - Chapter 29 (Careers Advice)
So, being skilled wizards (and career orientation being important in Potterverse), are their career choices mentioned anywhere?
NOTE: This question has also been asked (What did James and Lily Potter do for a living?) but was closed as a duplicate of the first question I cited. Apparently the OP was indeed focused on their revenue income. I am focused on the career choices.