cathadox

Developed backend components for a 3DS Server product providing secure card-based payment processing based on EMVco specifications. Implemented Spring Boot services with Spring Security and Java 8 APIs (streams, dates, file systems, generics) using Maven for dependency management. Worked with relational databases including Microsoft SQL Server, Oracle, PostgreSQL, and MySQL, managing schema changes and database migrations. Created and maintained bash scripts to support customer transaction history processing and operational tasks. Participated in customer demos using Angular for front-end prototypes and React or WordPress for documentation sites. Provided second-level developer support for integration issues, analyzing logs and configurations to help customer teams. Used Docker, Kubernetes, Jenkins, and Rundeck as part of CI/CD pipelines and deployment processes.

Supported development of the 3DS Server product using Spring Boot, Java 8, SQL, JUnit, and Mockito. Performed code refactoring and implemented smaller features under senior guidance to improve code quality and extend functionality.