In 2012, when I had been working full time in iOS development for 2 years, I used to frequently see tweets about companies looking for Apple developers. This is why I established the @XcodeJobs twitter account because I felt it would make most sense to retweet those job offers with a dedicated channel.
My thinking was that if you were looking for your next iOS gig you would just follow this channel and – once you found it – you could simply unfollow it. At the same time I wouldn’t spam people who are not looking for a job with these job offers.