DKatalis, the engineering force behind Bank Jago, Indonesia's first digital bank, has played a pivotal role in Bank Jago’s remarkable growth since its inception in 2019. Adopting MongoDB as its data backbone, Bank Jago transitioned from MongoDB Community Edition to MongoDB Atlas in 2021 to accommodate its expanding customer base, which reached 14.1 million by October 2024. This migration enabled the bank to efficiently handle its complex data architecture, support rapid user growth, and maintain regulatory compliance. MongoDB Atlas facilitated various efficiencies, including improved query performance, real-time capabilities, and community support, allowing DKatalis's 500 engineers to focus on innovation. The self-managed engineering culture at DKatalis fosters continuous learning and skill enhancement, especially with tools like MongoDB. The deep integration of MongoDB into Bank Jago’s operations has allowed the development of bespoke tools for data management, ensuring a seamless banking experience while supporting the bank's fast-paced growth.