I successfully integrated the Truecaller login feature on the msite, allowing users to log in without OTP, significantly boosting user logins. The feature was deployed across multiple platforms, including Facebook, Instagram, and Brave browsers, addressing third-party browser constraints where user consent was needed to launch the Truecaller login sheet. Additionally, I configured CXE control to run multiple A/B experiments and integrated backend APIs to seamlessly fetch user details and authenticate users directly on the msite.