Observability is not a luxury anymore — it’s a survival skill. In this talk, we’ll go hands-on with Quarkus and OpenTelemetry, demonstrating how to instrument your code to generate traces, metrics, and logs with minimal friction. We’ll wire everything into an LGTM stack (Loki, Grafana, Tempo, Mimir) and see how it all comes together when apps hit production. This session is about solving real developer pain: moving from “it works on my machine” to “I can actually see what’s happening in production.” You’ll leave with practical code examples and a mental model to build observable Java apps that scale with Quarkus and OpenTelemetry.