This article proposes a process for digital innovation platforms in the energy sector called DINNPU. The research method involves the documentary review of research in the field of innovation, transformation, and digital platforms capable of generating value and innovation to its ecosystem. As a result, we generated a conceptual and theoretical basis that allowed the formalization of the disciplines for the design of digital innovation platforms. The process we propose can be used in the development of innovation platforms and can be instantiated for a specific domain. Moreover, the assets produced can be reused to generate a product from a family of domains. The main disciplines of this process are analysis, design, and implementation of digital platforms. For the case study, an interview was conducted with a group of specialists in the ICT area of an energy company (Utilities) in order to understand the digitization process or current maturity of this company. Then it was validated whether the proposed model or design is applicable or should wait until the company achieves the necessary digital maturity. The contribution of this study is to propose a process for domain engineering, which allows contributing with knowledge and experience, for digital innovation platforms in various industrial sectors. There is an interest in this phenomenon due to global trends such as digital transformation and industry 4.0.