- There's a monthly "Who is hiring" thread on HN every 1st day of a month.
- Create a technical blog. When it gets popular and people see that it's high quality, brand awareness will increase. It takes time but it can bring massive gains. Extreme example: Cloudflare. But there are many smaller nice blogs. If your blog is good, it will naturally come up when people google for things etc.
- Create an RSS feed for the blog and a Twitter account ${Foobar}Engineering that RTs your blog posts. Just make sure the blog and Twitter are high quality and rare, and not random filler content every day.
- Do something unexpected, like: TikTok or YouTube channel. There's one small company in Poland that has a YouTube channel with basically short fun programming sketches (2-3 min), and this YT channel became huge. Everyone in IT in Poland knows them (https://www.youtube.com/c/HRejterzy).
- Relax your requirements, and post job offers to good job boards. Are you fine with people working remotely? Or 4 days a week? Check stuff like https://remoteok.com/ https://4dayweek.io/ etc.
- Include approx. salary data in job offer. No one likes this dance of "do they want seniors at half my current rate?".
- Perhaps become a sponsor of some underinvested opensource repos? The repo owners will likely give you some visibility on their website and top of the repo README.