The last posting for Phoenix was a part time Ramp Agent. It was on 4/10/18. I would recommend that you check the Southwest Careers page every day because Southwest has new job postings almost daily! From the Careers home page click on "search" this will bring up all open jobs.
"In order to remain consistent in our hiring practices and to be fair to all applicants, we accept applications for a specific position, and only when the job listing is active on our Careers page."