Worked on enhancing reliability and upgrade safety for Mule runtimes, focusing on zero-downtime migrations and DSL correctness. In the mulesoft/mule repository, introduced a dual LockProvider implementation with a CombinedService to enable rolling upgrades without service interruption, and abstracted locking logic via a new LockProvider interface and enhanced LockFactory in mulesoft/mule-api. Addressed DSL resolution issues by refining map-type handling and XML element pluralization to align with XSD schemas, improving schema-driven code accuracy. Strengthened OAuth authentication flows with improved logging and null-token protection. Utilized Java, XML processing, and API development skills to deliver robust, maintainable solutions.