Purpose: This study investigates the effects of user experience, perceived quality, service quality, and customer engagement on customer loyalty in e-commerce, with consumer trust as a mediating variable.

Research Methodology: A quantitative approach was applied using survey data collected from 389 e-commerce users in Indonesia. The data were analyzed using Structural Equation Modeling (SEM) to examine the proposed relationships.

Results: User experience, perceived quality, and service quality significantly enhance consumer trust. Consumer trust positively influences customer loyalty and mediates the relationship between these factors and loyalty. Customer engagement significantly affects loyalty both directly and indirectly through consumer trust. However, service quality does not show a significant direct effect on customer loyalty.

Conclusions: Consumer trust plays a central role in developing customer loyalty in e-commerce. Enhancing user experience, perceived quality, service quality, and customer engagement can strengthen trust and encourage long-term customer relationships.

Limitations: This study is limited to Indonesian e-commerce users and employs a cross-sectional design, which may restrict broader generalization.

Contributions: This study extends e-commerce loyalty research by demonstrating the mediating role of consumer trust and highlighting customer engagement as both a direct and indirect determinant of loyalty.