T This study examines the effectiveness of staff development and supervision in managing digital banking services at Bank Syariah Indonesia (BSI), with a specific focus on the activation of the Byond by BSI application. The main objective is toevaluate how development and supervision are implemented and how they contribute to the successful activation of digital services by staff. Using a descriptive qualitative approach and a case study design, data were collected through participatory observation, in-depth interviews with supervisors as key informants, and internal documentation. The findings reveal that development methods that are flexible,contextual, and grounded in practical experience enhance staff understanding of digital products and technical issue resolution. Collaborative and responsive supervision accelerates problem-solving and boosts staff performance in assistingcustomers. A two-way feedback system between branch offices and the head office also strengthens the ongoing development of digital services. The effectiveness of development and supervision depends on the organization’s adaptive capacity, thequality of inter-level interactions, and the functionality of internal communication. This study contributes to the enrichment of humanistic supervision theory and valuebased digital transformation in Islamic banking, and recommends strengthening modular training systems, integrating digital communication across units, and conducting comparative studies across branches to broaden the generalizability offindings.