Niksa Jakovljevic developed a targeted backend feature for the datastax/cassandra repository, exposing the assureSufficientLiveReplicasForRead method as a public API to support external validation of replication consistency. By making this method accessible, Niksa enabled external tooling and audits to verify that read and write replica intersections meet configured consistency level requirements, directly improving system reliability and governance. The work demonstrated careful public API design and a strong understanding of distributed systems, with changes scoped to minimize risk and surface area. Java was used throughout, and the implementation aligned with CNDB governance processes to ensure traceability and maintainability.