Java AWS RDS Certificate Update

I have a Java application currently running on Java 8 that demands an urgent certificate update. The application connects with an AWS RDS instance using PostgreSQL and current requirements necessitate an upgrade to a new certificate. Upon successful import and upgrade of the new cert in the AWS environment, the change then needs to be effectively verified through a manual testing process.

Skills & Experience required:

• Profound understanding of and substantial experience in Java 8
• Experienced working with AWS RDS (specifically PostgreSQL)
• Capable of certificate upgrade & import in AWS
• Well-versed in manual testing procedures.

Please, only submit a proposal if you can meet the aforementioned conditions.