Developer experience (DevEx), also known as DevX or DX, is increasingly recognized as a critical business factor, influencing software development effectiveness and innovation. It encompasses systems, technology, processes, and culture that collectively impact developer productivity, satisfaction, and operational impact. A robust DevEx ensures that developers can easily perform essential tasks, which is crucial for both internal software and customer-facing product development. Companies with superior DevEx outperform their competitors by enhancing talent retention, boosting productivity, and fostering innovation. The GitHub DevEx formula focuses on productivity, impact, and satisfaction, emphasizing a collaborative environment where developers thrive. A great DevEx involves readily available internal platforms, streamlined workflows, comprehensive documentation, and integrated analytics, ultimately shaping a culture that promotes shared responsibility, continuous learning, and open communication. While DevEx is not synonymous with user experience, lazy developers, AI implementation, or a one-person decision, it requires a holistic approach integrating cultural aspects with powerful DevOps and platform engineering tools. By prioritizing superior developer experiences, organizations can achieve competitive advantages, attract and retain talent, and improve business outcomes.