-Migrated multiple mobile applications from Xamarin to React, developing a universal UI for iOS and Android, and authoring comprehensive unit tests with Jest and React Testing Library to ensure application reliability.-Developed an Android application that leverages the device camera to detect user engagement with advertisements, yielding valuable insights into user interest by tracking view time and improving ad effectiveness analysis for clients by 15%.-Implemented Google ML Kit to develop a solution for detecting and analyzing user engagement with ads, using machine learning models to enhance real-time tracking of user behavior.-Maintained and optimized background-running iOS & Android applications in Swift & Java to efficiently track user time spent and usage on websites and mobile apps.-Created a reusable UI component library with React, which streamlined development processes, reduced code duplication by 30%, and improved project consistency across multiple applications.-Integrated certificate pinning to improve iOS & Android application security by ensuring encrypted communications were validated against trusted certificates, safeguarding against man-in-the-middle attacks, and strengthening authentication processes.

-As a proof of concept, embedded a chat-bot feature using WebSocket into the existing Nielsen Mobile App, enabling real-time push notifications and messaging-Implemented Google Play Integrity API in the Nielsen Mobile App to detect counterfeit, altered, or jailbroken devices, ensuring accurate data measurement by restricting app usage to genuine Android devices. -Collaborated with a team of developers to identify and resolve numerous bugs and errors in the software, improving overall system stability and performance.