n this lightning talk, I will share a concise case study from a mid-sized fintech company that leveraged Cilium, Hubble, and Tetragon to secure and observe their multi-cloud Kubernetes environment. The session will showcase how we implemented network policies, enabled transparent encryption, and utilized runtime enforcement to meet strict compliance requirements—without sacrificing developer agility. Attendees will see practical examples of troubleshooting, policy tuning, and real-time visibility, highlighting the integration of these CNCF projects to overcome real operational challenges.