<![CDATA[Seven Inc's new business unit requires an independent property marketplace application to systematically integrate inventory management and promotional strategies. This study aims to design and develop a web-based property marketplace application at Seven Inc to facilitate asset management, a freemium posting system, banner advertisement displays, and an administrator verification mechanism. The system was developed iteratively using the Prototype method. The "Tuan Tanah" property marketplace application was successfully developed with three access levels: customer, property provider, and administrator. The application integrates property inventory management, promotional banners, and an automated freemium mechanism that requires administrator verification for subsequent property uploads. Black Box Testing showed that all tested functionalities operated as expected. Usability evaluation using the System Usability Scale (SUS) with 18 respondents produced an average score of 71.67, indicating that the application falls within the Acceptable range with a Good adjective rating. These results indicate that the developed marketplace application meets Seven Inc's operational requirements and provides a usable platform for managing property marketing activities.]]>
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