Historically companies I've been at have had someone on staff, but we're a small startup and looking to get some UX/UI support. All of my googling has lead me to "gig" websites like Upwork or Fiver and talking to friends in industry (granted salaried UX/UI folks) have lead me to Linkedin or Indeed. Neither feels like the right place for what we're looking for. Does anyone have an suggestions for finding freelance designers we could work with iteratively? Thanks!

Context: Our company is rolling our a new platform out to beta users and are looking to refine some of our platform's interface. Mainly we're hoping to polish up some of the more amateur design elements across the platform and get help designing layout for tools/data presentation. We have done a good amount customer research on what folks are looking for, will be getting active feedback after pushing the changes, and are hoping to iterate with said feedback.