Rangga (Biner) Hadi Putra is a Tech Lead, QA Engineer, and Certified Mobile Engineer with a strong track record in building high performance mobile apps for Android and iOS. As the Co-Founder & Tech Lead at Gako, he led the development of a scalable Kotlin Multiplatform app and integrated cutting edge Generative AI features to enhance user experience. His expertise spans full cycle mobile development and structured QA strategies using tools like Katalon, Postman, and BDD frameworks, ensuring every product shipped is reliable, intelligent, and user-centric. Rangga's work is defined by clean architecture, cross-platform efficiency, and a deep passion for building software that truly makes an impact.