<![CDATA[This study developed Glow Express as a cosmetics and skincare e-commerce prototype integrating buyer and seller modules in a mobile application, a web-based administration dashboard, a REST API, a MySQL database, and a seller wallet. The Prototype method was applied through three major iterations and seven improvement cycles based on internal evaluation in a local environment. Black-box testing covered nine positive-path scenarios: four for buyers, three for sellers, and two for administrators. The test results showed that all scenarios met the defined indicators, yielding a functional success rate of 100% (9/9). The cross-role workflow, from product search and checkout to order fulfillment and seller-wallet updates, operated as an integrated process. The main contribution is the integration of three user roles, a mobile application, a web dashboard, a REST API, and a wallet mechanism in one transaction flow. These findings are limited to internal functional validation; external UAT and non-functional testing were not conducted.]]>
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