Strong knowledge of fab/AT workflows: WIP management, lot/recipe management, routing, tool state models, dispatching, traceability, quality/test operations, SPC/SPC-ready data flows, and engineering workflows. Architect a unified API and service layer for seamless integration between MES, E3/APC gateways, AMHS/OHT, equipment automation, facility systems, scheduling/dispatching engines, quality/test systems, and business systems (ERP, PLM).