Abstract This study investigates the influence of financial technology (Fintech) advancements on the resilience and growth of the banking sector in Zambia, with a specific focus on selected commercial banks in Ndola District. The rapid evolution of digital financial technologies—including mobile banking, artificial intelligence, blockchain, and digital payment systems—has significantly transformed banking operations worldwide. However, despite these advancements, developing economies such as Zambia continue to face challenges related to infrastructure, cybersecurity, regulatory frameworks, and digital literacy. The study addresses the research problem of whether Fintech adoption contributes to sustainable improvements in operational efficiency, customer satisfaction, and institutional resilience among local banks, or whether its impact is limited to short-term operational gains. A mixed-methods research design was employed, combining quantitative data from structured questionnaires (n = 60) with qualitative insights obtained through interviews and focus group discussions. Quantitative data were analysed using descriptive statistics and regression analysis, while qualitative data were examined through thematic analysis. The findings reveal that Fintech adoption significantly improves operational efficiency (mean = 3.92), customer satisfaction (mean = 3.86), and growth resilience (mean = 4.10). Regression analysis further confirms a strong positive relationship between Fintech adoption and banking resilience (β = 0.714, p < 0.001). However, the effectiveness of Fintech is moderated by factors such as technological readiness, regulatory support, and digital literacy levels. The study concludes that Fintech is a critical driver of banking resilience and competitiveness in Zambia. Its significance lies in informing policymakers and financial institutions on how to leverage digital innovation while mitigating risks to ensure sustainable financial sector development. Keywords Banking resilience; Customer satisfaction; Digital banking; Financial inclusion; Fintech adoption; Operational efficiency; Zambia