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This contribution studies how the different levels of design integration in a company pragmatically determine the exercise of design. To that end, we assign a level of design integration in the company (Danish Design Center 2001), not only to the typology of design management (Borja de Mozota 2003), but also to design practices and objects. If design management studies the impact of design on the organization that adopts it, it is crucial for design science to study the transformations of the ways of “doing design” that are concomitant with these managerial transformations. This article looks at how design is formalized at different levels of integration within the company. It draws on seven years of digital design (2015–2022) within a French building energy optimization company. This period includes a CIFRE thesis written by the author, who documented the growing integration of design in the company, as well as the evolution of its practices to design a digital product. The reflection starts with a reminder of the context and the notions used, describes the evolution of design within the company, then discusses the objects produced at each level of design integration in the company, in order to finally link them to design skills. By bringing together design management and design, this experience sharing and reflective approach documents design practices through the prism of the object.