In college I made an app that did some simple calculations to determine the availability of parking spots at my overcrowded commuter school. It was not very advanced at all; it had a label and traffic light for each parking lot and was based on the timing of classes to change the color of the light.
When I showed it to a recruiter, I got an internship that lasted 8 months at a well known software company where I gained enough experience to move on to a better and more organized company.
I didn't receive the best education, and certainly am not the brightest amongst my colleagues, but I have no doubt that developing and publishing that specific app in school led to my current position.
The blog is not up anymore.
It had no readers or visitors, but I mentioned it on my resume.
Eventually I brought some of my work to a repair facility as part of my interview & got the first job I ever liked!
https://github.com/vutran/dext/
In general, just being active in the open source community makes landing a job much easier.
+ Notational (https://notational.co/) (https://github.com/tmm/notational)
+ Gifsearch (https://github.com/tmm/gifsearch)
+ Some others on GitHub (https://github.com/tmm)
More projects here: https://github.com/RichardKnop