A telegram channel that is great to use if you are interested in candidates from Eastern Europe — this messenger is one of the most popular there, especially among representatives of the IT community.
The placement of job openings in the channel is free, you just need to fill out the Google form specified in the profile. The audience is quite large, the focus is on remote work, so if your vacancy involves remote, be sure to post there. You can immediately specify your direct contact for responses, which greatly simplifies communication with potential candidates.