Common mental disorders are a major public health concern, particularly in low-resource settings where specialist services are limited. While task-shifting to non-specialist providers (NSPs) has improved access, maintaining their competency during scale-up remains a challenge. This study evaluated a technology-assisted platform (TAP) for training and supervision of NSPs delivering the WHO Thinking Healthy Programme (THP) for perinatal depression. The android-based hybrid platform integrates avatar-led instruction, digital modules, video demonstrations and structured supervision. Qualitative data were collected from three focus group discussions with peers (n = 24), one with trainers (n = 4) and four interviews with peers who left the programme. Data were analysed using the framework analysis approach. Peer competencies were assessed, in a simulated role play setting, using WHO’s Ensuring Quality in Psychological Support (EQUIP) tools immediately post-training and at 6 and 12 months. The hybrid model, combining automated digital training with human facilitation, was well received. In-person trainers valued avatar-based instruction, video modelling and automated guidance. Participants reported high satisfaction with the digital learning experience, enhanced technological skills, knowledge retention and confidence. Structured supervision supported competency by standardising supervision agendas, case management and fostering ongoing learning. Competency scores demonstrated sustained improvement over 12 months. Technology-assisted platforms such as TAP represent a scalable and sustainable strategy for strengthening NSP training and supervision, helping to maintain and potentially enhance the competency of psychological intervention delivery in low-resource settings.