Designed and deployed a Docker Swarm monitoring stack across 3 VPS, orchestrating OpenNMS, Kafka, PostgreSQL and scalable SNMPsim Minions to simulate 500K+ nodes. Built differentiated SNMP simulation, tuned Kafka/PostgreSQL for high-throughput telemetry, automated OpenNMS node-down alerts, rebranded OpenNMS Jetty with Maven/Jenkins CI/CD, and developed a Python REST API for IPSec tunnel health, self-healing and log retrieval.