Developed a lead-discovery and review application with configurable search rules, scheduled polling, matched-book context, draft editing, and separate reply-posting actions. Connected Angular workflows to Java Spring Boot APIs and persistence. Implemented conditional polling-job claims, cursor tracking, and duplicate checks, with a concurrency test covering twenty competing claims. The application organizes discovered leads into a review workflow and separates saving a draft from publishing a reply, with controller tests for key success and error contracts.