During May 2026, contributed to the stone-payments/demo-sdk-android repository by delivering a compatibility update for the Gertec GPOS Series 7 devices. This work involved updating the implementation and incrementing the SDK version to align with the latest device features and fixes, thereby improving compatibility for customers and reducing integration risks. The approach emphasized careful release engineering and stability checks, ensuring a smooth transition for new hardware support. Leveraged skills in Android development, the Gradle build system, and Groovy to maintain repository quality and prepare for future device integrations, with a focus on clear commit messaging and maintainable code structure.