During January 2025, VenkatasivareddyTR focused on backend development for the aws-athena-query-federation repository, addressing a bug in query passthrough validation. He enhanced the SQL statement validation logic in DDBQueryPassthrough by replacing a broad disallowed-keywords check with a more precise rule that ensures statements begin with SELECT. This adjustment improved the accuracy of federated query validation and reduced the risk of misclassifying legitimate requests. Working primarily with Java, SQL, and AWS Lambda, he demonstrated careful attention to code reliability and data-source integrity. The work reflected a targeted, in-depth approach to refining backend logic rather than broad feature development.