Developed an enhancement for the apache/nifi repository, expanding the JoltTransformJSON processor to support transformation of JSON data stored within FlowFile attributes. This work introduced new configuration properties to specify the JSON source and attribute, enabling attribute-level data transformation without moving data into FlowFile content. Implemented robust routing logic so that successful transformations are directed to a 'success' relationship, while failures are routed to 'failure', improving reliability and flexibility in data pipelines. The solution was built using Java and leveraged skills in Apache NiFi processor development, attribute manipulation, and JSON processing, with thorough validation and integration into the main codebase.