This case study documents the challenges and solutions faced by Trendyol, a leading e-commerce platform, as it sought to improve its database capabilities to support rapid business growth. Trendyol, founded in Turkey in 2010, connects over 250,000 sellers with more than 40 million customers across various regions. The company faced significant scalability issues with its legacy relational database, which could not meet the demands of its claim reimbursement application. To address these challenges, Trendyol adopted Couchbase's NoSQL database, which provided the necessary flexibility and performance improvements. The implementation of Couchbase led to a 75% improvement in query performance and a 10% increase in coupon usage rates. Additionally, the platform enabled Trendyol to efficiently manage its catalog and inventory while supporting a cloud-native approach across multiple cloud service providers. The case study highlights the significant enhancements in operational efficiency and customer experience achieved through this technological transition.