André Staltz It is the last day of my employment at Futurice, and my first day as a self-employed open source hacker with a mission to build a new social network project. I joined Futurice in 2013 as a Web and Mobile Developer. At that time, I had less than a hundred Twitter followers and had never heard of reactive programming. Gradually, I started being exposed to RxJava for Android development, and began my journey learning Rx Observables. I learned a lot at Futurice, and had absolutely brilliant peers who inspired and challenged me. As I learned, I started teaching others my findings. I wrote The introduction to reactive programming , then built RxMarbles to help visualize how some RxJS APIs worked. In the subsequent months and years, I built Cycle.js and spoke at many conferences, all the while basing my open source developments on insights gathered at work in Futurice. It ...