The objective of this paper was to investigate the factors that affect the sharing of justice and network relation to developing the engagement in freelance. The study was conducted from in-depth interviews and used Grab as a case study of sharing economy businesses. In-depth interviews were done with experts in sharing businesses and operators who own vehicle assets. In addition, relevant literature and theories were reviewed to consider the conceptual framework and factors obtained from this study. This study is only part of the main research that the author is currently studying. From the results of the interviews, Grab's sharing justice had a clear sharing of financial interests along with support in finding customers. In terms of network support, there was support to work together, and Grab's members shared their career knowledge. It was found that sharing justice and network relation could well develop the engagement in freelance and that they were highly linked to each other. According to the conceptual framework and results obtained from this study, the factors that affect the development of sharing economy businesses to create the engagement in freelance could be divided into two parts: sharing justice consisting of (1) distributive justice, (2) procedural justice, and (3) interactional justice, and network relation consisting of (1) physical support, (2) knowledge sharing support, (3) emotional support, and (4) companionship support. Finally, in the near future, after data collection and analysis have been completed, the author will present this research in a complete form that presents the whole conceptual framework because some of the content is still in the process of collecting population samples.