Purpose This study aims to explore the impact of bring your own device (BYOD) practices on teleworkers’ job performance, work–life conflict and their implications for environmental sustainability, with a particular focus on Green IT in the post-pandemic remote work context. Drawing on the job demands–resources (JD-R) model, it examines the relationships between private technology adoption, job demands, job resources, job performance and work–life conflict, while also assessing how BYOD impacts environmental outcomes such as electronic waste reduction and carbon emissions. Design/methodology/approach The study used confirmatory factor analysis and structural equation modelling (SEM) using AMOS version 22 to evaluate seven hypotheses among 424 full-time teleworkers from various occupational sectors in Mauritius, a developing country. Findings SEM results confirm that BYOD enhances job performance and work–life conflict through increased job autonomy, workload and work pressure. BYOD and teleworking also contribute to Green IT and environmental sustainability by reducing energy consumption and electronic waste, indirectly supporting broader sustainability goals through reduced corporate device demand and lower commuting-related emissions. Practical implications Organisations should leverage BYOD policies to advance Green IT practices and improve work performance in remote settings, focusing on balancing job demands with resources like work autonomy to enhance productivity and well-being. Originality/value The findings strongly support the JD-R model in the context of remote work and BYOD, particularly in developing economies with limited infrastructure, offering insights for policies that enhance both employee well-being, Green IT and environmental sustainability.