Developer innovation has been at the very heart of the digital revolution since its beginnings and is still leading social and economical transformations induced by emerging technologies. Yet, developers as a class have largely been ignored by research in Human and Social Sciences. This disregard may be related to the fact that they cannot be classified using specific social or economical statuses without leaving out the underpinning dynamics making them special. To seize those dynamics, one has to acknowledge a fundamental distinction between “day job” and “side-project,” characterizing their modus operandi. This “double game” has implications in both the way we conceive action in general and the way technological potential is explored in the industrial field. In their movement, developers also create new forms of organization supporting their personal explorations, such as the Barcamps and the Hackathons.