[3][4] After graduating from Florida Coastal School of Law in 2011 and being admitted to the Florida Bar, she returned to Clearwater and worked as an assistant public defender in the state's Sixth Judicial Circuit, and then as a lawyer in private practice.

[5] In 2020, Rayner ran for the Florida House of Representatives seat vacated by Wengay Newton, who opted to run for the Pinellas County Commission.

Rayner garnered 31.3% of the vote against three other candidates in the Democratic primary, with second-place finisher Keisha Bell receiving 26.8%.

[9] In April 2022, Rayner argued that the effort to repeal the Reedy Creek Improvement Act was emblematic of the "deep selfishness and the deep blind political ambition" of Ron DeSantis, and adding that it is "unconscionable" that he is doing this effort on the "backs of working people.

"[10] On April 21, 2022, Rayner attempted to stage a sit-in demonstration to prevent a vote on Florida's congressional district maps.