• Built scalable Venmo ad integration, extending PayPal’s advertising reach by 40M+ users and enabling a new revenue-generating capability across the ad ecosystem.

• Implemented Rokt post-P2P transaction offer delivery, boosting user engagement by 45% and powering 3M+ daily impressions across mobile platforms.

• Implemented OAuth2-based API security for buyer authentication services, helping reduce unauthorized access by 40% and improving transaction safety for millions of users.

• Developed backend solutions for Labware LIMS within the Laboratory Systems team using Java and Spring Boot, reducing operational delays by 30%.