IBM i / iSeries engineering (hands-on) Strong production support & incident management experience (L3/escalation level) Experience supporting payments / transaction processing / settlement systems IBM MQ (administration, tuning, troubleshooting) MIMIX (replication, failover, role swaps) NDM (Connect:Direct) for cross-platform data transfers DB2 for i (recovery, restore sequencing) Security & certificates (DCM, access controls) Nice to Have Experience with ACH, Wires, Cards, or