Worked on the americanexpress/synapse repository to enhance the stability and portability of the Synapse module by addressing a key data access issue. Focused on improving cross-environment compatibility, the developer refactored the entityManagerFactory configuration to use the DataSource interface instead of the concrete HikariDataSource class. This adjustment reduced dependency-wrapping issues and allowed for broader support of different DataSource implementations, aligning with Spring Boot and JDBC best practices. Utilizing Java and leveraging expertise in database configuration, the work improved maintainability and reduced runtime errors, ensuring the module could be reliably deployed across development, testing, and production environments.