Can I omit the word "working" from the "working experience"?

[Kwfine]

Dear teachers,

I had been working as a student helper for a few years in a bookstore located at my school.

My friend, Jan, was asking me why I didn't quit the part-time job even if there were a lot of school projects and assignments.
Here is what I told her:
Yes the time was tight but I think I had benefited from the experience because
I was working with some professionals there...
Some time after our conversation, I thought I had made a big grammar mistake in what I had told Jan. Maybe I should specify to her that
"I had benefited from the working experience ",
instead of just saying
"I had benefited from the experience".

Please advise, teachers
Thank you.

Kitty
_________________
各位前輩安安, 我是kitty喔!

[Mister Micawber]

No, you don't need 'working' there, Kitty– it is clear from the context what you mean.
_________________
Native English teacher at Mister Micawber's

[Kwfine]