Basically it boiled down to sheer ignorance. I didn't know that being a single-founder was such a big deal (in a negative sense), so I didn't know I should have been worried/nervous about it when applying/interviewing.

As for working alone... I had done so many personal projects at nights/weekends after work at my day job that working alone was just natural (again, ignorance was bliss). I was also able to draw from each of the previous projects to piece together what I needed to build Notifo very quickly.

This is the advantage of working on a bunch of different small projects all the time. The criteria I used for starting a new project was that I had to do at least one thing I had never done before which required me to learn a new language/technology/framework/API/etc.... after a dozen projects or so, this built up to a huge arsenal of skills to throw at new projects. Never stop learning.

That said, having had a co-founder for about a week, there has been an obvious increase in productivity, so for that I am truly thankful.