• Implemented View Binding across all modules of the framework, replacing Kotlin synthetics, resulting in a 95% reduction in view-related crashes in production.• Revamped Android codebase by transitioning from outdated callback-based API calls to a structured MVVM architecture, significantly improving backend data retrieval efficiency and code maintainability.• Developed the Individual File and Folder Sharing feature in the Rakuten Drive application, enabling users to share with set permissions through email and link sharing. Implemented corresponding actions on the receiving end, ensuring seamless usability. Collaborated with the Product Manager to resolve permission conflicts, enhancing the overall functionality and user experience of the feature.• Implemented Single Sign-On (SSO) login flow for B2B product integration, utilizing Firebase SDK andOAuth providers like Microsoft Azure Active Directory. Integrated web-based OAuth login to enable seamless end-to-end user authentication.• Enhanced the security of the app by implementing AutoLogout on Password Reset and Delete Account functionality utilizing the MQTT messaging protocol.