Allo Bank, a digital bank launched in 2022 and part of the Citicorp group, rapidly gained over 10 million customers and became the most downloaded digital banking app within a year of its debut. To accommodate its expansive digital services ecosystem and customer base, Allo Bank adopted an API-first strategy powered by Kong, enabling seamless integration with various technologies while ensuring compliance, security, and scalability. Daniel Niko, Head of Application Management, highlighted the importance of Kong in supporting the bank's transition from monolithic applications to microservices, enhancing their ability to handle increased transaction volumes and reducing transaction costs by 70%. By leveraging Kong's customizable plugins and open-source capabilities, Allo Bank successfully migrated its services, witnessing a fourfold increase in transaction handling capacity and ultimately phasing out its legacy middleware systems.