A significant amount of modern professional communication takes place in the so-called Virtual Communities of Practice or Professional Virtual Communities (PVCs): social systems of individuals who use Information Technologies to mediate their relationships and facilitate knowledge exchange and generation. In current research we analyze one of the biggest Russian IT-PVCs, Habrahabr.ru. The community’s official goal is connecting the IT-specialists; communication takes form of users articles and comments; users can rate the articles, the comments and the other users themselves. Using the number of SNA instruments, community’s metadata, linguistics statistics and discourse analysis we show the structure of the community, main topics within the professional field, and find the core ideas and values which “paste together” the communities members.