I think about: https://www.bloomberg.com/graphics/2015-paul-ford-what-is-co...
- I joined the major slack channels of developers/designers/whateveryoulookforspecialists in the area.
- joined the #workrequests, #jobs, #yougetthepoint channels
- actually read the guidelines of each slack channel and/or talked to the admin to have the right tone of voice, get their feedback, finetune it, etc
- posted the job
- after 1-2 years, specialists still come to us because of the posts
- maintain a spreadsheet so you don't lose track of good people