In this article, the first of a series, I introduce a framework for maximizing developer effectiveness. I have found there is a stark contrast of approach between companies that have high and low developer effectiveness. Case Study: Spotify Spotify conducted user research among their engineers to better understand developer effectiveness. When new tools and techniques are introduced, these metrics can clearly show the degree to which developer effectiveness is improved or at least isn't worse. However, distributed systems also make many things difficult (see Microservice Prerequisites), including developer effectiveness.