Worked on the taskforcesh/bullmq repository to enhance sandboxed job orchestration for complex queueing workflows. Developed the moveToWaitingChildren API, enabling a parent job to pause and set its child jobs to a waiting state for coordinated execution. This required cross-component updates to the sandbox, Job, and ChildProcessor modules, as well as interface adjustments to support the new orchestration logic. Added a dedicated test fixture and expanded the test suite to ensure robust validation of the new behavior. Leveraged backend development skills with Node.js and TypeScript, focusing on improving throughput and reducing latency in batch processing environments.