Doubble, a unique dating app that matches pairs of friends instead of individuals, has successfully leveraged CockroachDB to enhance its scalability, performance, and global reach. Initially built on MongoDB, Doubble faced scalability and latency issues, prompting a transition to CockroachDB, which offered a relational database structure and distributed scalability. This transition, aided by GitHub's Copilot, allowed Doubble to expand its user base and enter new markets, beginning with Denmark and then Sweden and Norway, while learning valuable lessons from a challenging launch in Los Angeles. Doubble's infrastructure, built on CockroachDB, supports rapid regional expansion and data compliance, ensuring high availability and quick adaptation to customer demands, such as language changes for new market entries. With plans to re-enter the U.S. market and introduce premium features, Doubble continues to focus on building trust and enhancing the user experience in the competitive online dating landscape.