Commitment is the manifestation of trust. Therefore the building of trust in global software engineering (SE) companies is a relevant question to study. The objective of this research is to explore the trust-building processes in global SE from a cultural perspective. In this research, staff from five large multinational SE companies were interviewed. In the conceptual part of the article, firstly the domain of SE is introduced, secondly there is a discussion on the concept of trust and trust-building processes and thirdly, cultural dimensions affecting trust-building processes are examined. Finally, findings from the case companies are discussed.