The article examines the management of cross-functional IT projects during the implementation of IoT solutions in the financial sector, focusing on aligning architecture, risk, and organizational accountability under high integration density. The study’s relevance lies in the fact that IoT in finance is becoming an infrastructure technology. Telemetry supports service continuity and reduces operational losses in payment infrastructure, physical security, engineering systems, and insurance models of observable risk, while simultaneously increasing the complexity of device life cycles and tightening requirements for traceability and regulatory correctness. The purpose of the article is to identify patterns in cross-functional management of IoT implementation and to describe a practical framework for coordinating business, IT, security, compliance, operations, and suppliers throughout the device and data life cycles. The scientific contribution lies in synthesizing fragmented requirements into a unified management model. This model incorporates a steering layer for prioritisation and risk appetite decisions, a linkage between the roles of product owner and program manager, a responsibility matrix for grey zones, and a risk register that converts threats into verifiable tasks. The main conclusions can be summarized as follows. The success of IoT implementations in finance is determined by the management of interdependencies between layers (devices–connectivity–data–integrations), by disciplined version and configuration control in edge scenarios, and by the transition to a service-oriented operating model during scaling. The article is intended for program managers and product owners, architects, information security specialists, and compliance specialists responsible for the industrial deployment of IoT in financial organizations.