Reuben received a B.A. in Political Science and Economics from UCLA in 2003. She attended UCLA School of Law, earning her J.D. in 2006. Following law school, Reuben practiced civil litigation for over a decade, focusing on business law and insurance coverage. Beginning in August 2017, she served as an adjunct at Western State College of Law, teaching 1L legal research and writing and upper-level sales law courses. Beginning in August 2020, she also served as an adjunct professor online with Mitchell Hamline School of Law, teaching legal research and writing.