I've heard other people say the same thing... It's interesting. My projects have definitely got me interviews, but I admit that it has generally happened when I met someone at another event. You get to talking about what you've been working on and I just pull out my laptop and show them. So maybe that's the difference. I know that when I've been hiring, I always look at people's side projects. If they have a nice project I might not even bother looking at their CV. I might be strange, though...

The term side project is often associated with Hobby. Those who do not appreciate side project also do not appreciate the amount of work that can go into 1. If you put real hours into it, your best interest is sharing your side project as if it was a part-time contract. You never have to divulge how much you made on a side project.

This is a lot harder if your side project is a solo work.

Just treating your project like this, can allow for you to control the conversation better during an interview.

Your prospective colleagues and bosses would have been impressed by it. However, to impress the recruiter is a different ball game. Especially the inexperienced recruiters, who don't always understand the challenges of one technology vs another. Another possibility could be you were person #25 or even #7 to apply to the job and they already found a pretty good fit in the first 6.

At the end of the day, the person is hiring to fill a specific job. A side project can represent every aspect of a business/product, it's the interviewee's job to spin it in a way that makes it relevant to what the interviewer is trying to hire for.

I think a big mistake a lot of people make with side project marketing is throwing the entire kitchen sink at the interviewer.

I was told I was to business focused and not technical because of my side project. Even though I learned a completely new language on mobile.