Worked on the oracle/terraform-provider-oci repository to address a critical concurrency issue affecting Network Load Balancer (NLB) reliability. Focused on backend development using Go, the work introduced mutex-based concurrency controls across all NLB control plane sub-resources, effectively eliminating race conditions and reducing parallel access issues. Additional enhancements included updates to backend set configurations and listener components, improving overall stability and behavior in infrastructure-as-code workflows. Emphasized thorough testing to ensure upgrade and rollback safety, with all changes linked to a specific commit for traceability. The engineering effort prioritized robust concurrent programming practices to strengthen NLB reliability in production environments.