Worked on stabilizing executor propagation and thread management within the spring-projects/spring-pulsar repository, focusing on improving reliability during message processing. Addressed a concurrency issue by ensuring the factory-level Task Executor was correctly propagated to the container, which resolved inconsistencies in thread management for Pulsar message consumption. Enhanced the codebase by adding regression tests to validate the new behavior and aligned container property handling with executor settings for easier maintenance. Utilized Java and the Spring Framework, applying unit testing practices to verify changes. The work contributed to more predictable threading and improved maintainability in the Pulsar integration, reflecting careful engineering depth.