Tons of people in this space hang out on various places online, where you can simply advertise or do some PR and many do, is it really that difficult?
I've never been hired from IRC though.
HN who's hiring, like most online job advertising, is a crapshoot. It's a once-a-month post where you are drowning in noise. Finding a very large group of potentially relevant people for the roles you are hiring for isn't as straightforward as it sounds. Engaging said group and convincing folk from said group to come work for you is exponentially more difficult.
>>When was the last time you engaged with a company with a view to working with them because you saw an ad they happened to post in the right fora?
So, yes, hn is where I engage with a company with a view with working with them where they happen to post in the right forum. Suddenly your point is that it isn't a good place to find jobs? Maybe not, but that wasn't your original point. You're moving the goalposts.
Places like HN and relevant IRC channels are great if you're hiring for one or two roles but beyond that then it's a bit of a lottery.
At the past companies I've worked in finding the talent is the real issue. At my previous company it wasn't so bad as we had an in house recruitment team who generally dealt with sourcing, and generally we had a bigger budget for these kind of things.
However now I'm working in a smaller startup and we're having a lot of difficulty finding the right candidates without bowing to the extortionate cost of recruiters. We've tried the monthly who's hiring, angel.co and other such sites but it's a very slow process, and it's a lot of work to trawl through profiles.
Could do with some disruption in this space!
The real difficulty in recruiting in this space is finding and engaging these people, not testing them.
If this is a Hacker Rank for sysadmins, then great. I'm sure you'll have plenty of users but we're still a long way away from solving the bigger problem.