Consider the alternative: "Hi, I think you might be a developer, but I haven't looked at any of your public stuff, and yet in a thinly veiled attempt to make i

Consider the alternative: "Hi, I think you might be a developer, but I haven't looked at any of your public stuff, and yet in a thinly veiled attempt to make it seem like this email is personalized, I'm going to tell you I think you're a particularly good fit for this role, which involved [buzzword], [buzzword], and [buzzword]!" Would that be more to your liking? Github and Meetup are inherently social, default-public communities. You should consider it a sign of respect -- or at least a signal of intent -- that someone's taken the trouble to actually review your stuff.