This comment is pretty interesting, it's almost indistinguishable from the "I work from home and make $10k a week!!" facebook posts plaguing comment sections... but it might make legitimate sense in context!
Aren't half the comments on HackerNews basically "I work on a similar project, check out my project"? Although extra suspicious when it's a green user.
Which to be fair, I'm entirely fine with as long as the projects are legitimate. In the world of programming, there are so many cool and useful libraries, services and tools out there that you have little hope to find out about them otherwise.
The only way to find out is to click the link.
edit: And it's legit!