Members of mobile app design teams collaborate with each other to accomplish tasks and/or to socialize. How network configuration of instrumental and expressive interactions affects team creativity, efficiency, and satisfaction has not been studied. Taking account of both simplex and multiplex social networks in teams, this study develops a research model examining the mechanisms by which the centralization of different types of networks impact team performance. To test our research hypotheses, we collect data from 62 student teams working on a class project of app design. We find that the centralization of the instrumental-expressive multiplex network reduces teams’ information elaboration and similarity perception. The centralization of the instrumental simplex network is beneficial to information elaboration. Team information elaboration positively influences team creativity, efficiency, and satisfaction. Team similarity perception negatively affects team creativity and positively affects team satisfaction. To alleviate concerns about the potential simultaneity bias between network configuration and information elaboration or similarity perception, we replicated the results based on a cross-lagged analysis with additional data collected from 48 design teams at two points: at team establishment and at project completion. This paper contributes to the literature in software development by examining the mechanisms via which the configuration of multiplex and simplex networks affects team performance.