The formation of software development project teams is carried out, conventionally, in an empiric manner; however, in this process, multiple factors should be considered. In literature, the works where this process is modeled are scarce, and most do not consider aspects linked to the formation of the team as a whole. In this paper, a group of patterns that contribute to the formation of software development projects teams are identified through the use of the Delphi method, psychological tests, and data mining tools. The paper identifies patterns that are validated experimentally, while psychological characteristics in the process of software team formations are exemplified.