Earlier quoted context omitted.
Interest usually correlates with the desire to learn and explore on one's own time. If you have a team of interested developers/hackers, then the lack of enthusiasm can drag the team down, both in knowledge and culturally. This isn't always true, of course. Some developers can have excellent skill and have no interest in programming outside of work. I have a coworker that does virtually nothing outside of work, doesn…
> Interest usually correlates with the desire to learn and explore on one's own time. I don't agree. Interest in doing a good job (i.e. work ethic) usually correlates with this, but I do not think work ethic corresponds very well with interest in the field. > If you have a team of interested developers/hackers, then the lack of enthusiasm can drag the team down, both in knowledge and culturally. I think part of my pr…
The discussion is whether someone who is just in it "for the paycheck" will be able to solve those business problems as effectively as someone who has a deeper interest in technology for technology's sake. By itself, that's obviously not enough signal to say one way or the other. There certainly are extremely valuable people who don't code outside of work, follow new language and tool discussions online, etc. I think it's equally obvious though that such an interest is a positive signal. If you told me nothing else about two potential hires except person A writes Java at work and has no interest in the field beyond that, and person B writes Java at work, but has a Github page full of utilities she wrote in Go, Lisp, Haskell, whatever, I'd bet a small amount that person B is probably better at solving technical problems. You can't say that for sure, and any of the myriad other factors that actually do matter could break the other way and make person A the better hire for an actual business, but outside interest is a positively correlated trait.