The rapid shift towards digital financial services has significantly transformed the understanding of security and user experience. This paper examines the transformative power of artificial intelligence (AI) in enhancing fintech security, focusing on the human element. The analysis reveals how AI can effectively address security challenges while improving user engagement in financial technologies by exploring the intersection of technological advancement and user-friendly design. Through a critical lens, the discussion uncovers the potential and pitfalls of implementing ethical, transparent, and inclusive AI systems. It is emphasized that the success of sustainable e-finance innovation depends on technical capabilities and aligning AI development with customer expectations and regulatory requirements.