Developed and maintained Android applications for secure payment terminals serving the North American market.
Resolved software defects and implemented system enhancements to improve application stability and performance.
Implemented payment features supporting EMV chip, contactless (NFC), magnetic stripe, and manual card transactions.
Built, tested, and deployed Android applications using Android Studio and Gradle.
Integrated REST APIs for transaction processing and application configuration.
Managed source code using Git and collaborated within Agile/Scrum teams.
Worked closely with QA, business analysts, and developers to deliver software releases and resolve production issues.
