During September 2025, Karthikeyan Ramasamy developed recurring payments support in the Braintree iOS SDK’s App Switch flow, enhancing merchant monetization options. Working in the braintree/braintree_ios repository, he implemented new recurring payment fields and ensured billing plan metadata is passed during App Switch, allowing merchants to initiate recurring transactions without requiring an immediate purchase. His approach included comprehensive unit tests to validate the new functionality and maintain backward compatibility with existing integrations. Using Swift and leveraging his skills in payment integration and SDK development, Karthikeyan updated documentation and code comments, delivering a focused, well-tested feature that reduces merchant friction in recurring billing.