The term “developer experience” (DevEx) emerged in the early 2010s as a response to the growing importance of developer communities in the tech industry, ensuring happy and productive developers through a seamless experience. While numerous theoretical guidelines exist for DevEX, this talk focuses on practical implementation and case studies. Drawing from our own experiences in large organizations like Rabobank & Bol.com, we explore diverse approaches to fostering a DevEx culture. We will show how different high-level incentives behind DevEx Culture adoption, change the strategies of big and medium size organizations toward the implementation. Finally we will also introduce qualitative metrics that guide strategic decisions while fostering a culture of continuous improvement.