PurposeThe purpose of this research is to analyze the development of high‐tech international new ventures as an acting process by individuals in relationship networks.Design/methodology/approachThe study cross‐fertilizes research on internationalization of international new ventures, opportunity development of entrepreneurs and innovation development in technology‐based firms. A longitudinal case study on the development process of an international new venture operating in the software business is used as a base for analytical generalization and theory development.FindingsThe study illustrates events at three intertwined levels of acting on the development of an international new venture. It defines internal problem solving, external solution creation, opportunity selling and opportunity organizing as the behaviors driving the emergent, multi‐level process and embedding the venture in various networks.Research limitations/implicationsStatistical generalization based on common patterns experienced by several firms was not sought in this study. Using the process research approach with event‐based analysis, the study, however, provides an in‐depth analysis of international new venture development through the actions of individuals at the level of key events. The methods for examining a complex development process over time can be utilized by other process researchers.Practical implicationsThe complexity of building high‐tech international new ventures is, to a great extent, due to the necessity of handling the process at three levels simultaneously and in connection with one another. Since international new ventures are often based on business opportunities that have a short window of opportunity, the timeline creates further challenges. Embedding the business into various resourcing, legitimizing and otherwise assisting networks is crucial.Originality/valueThe study provides an insight into the ways of acting in networks that intertwines the internationalization, opportunity and technology development with development of a high‐tech international new venture. The study follows the development process in real time, something that is quite rare in previous international entrepreneurship research.