Two quick thoughts ..
Bounty threads .. would authors be interested in drawing devs form other places? Craigslist, Reddit and other jobs boards would be a good place to post these. Linked back here or in original post.
Encourage bounty software to be open source.
Made a post withing Bitcointalk market place > Services.
https://bitcointalk.org/index.php?topic=1462617.new#new
I have also been contacting reaching out on various Slack teams.