Handling Large Scale: Tuning etcd and API Server.

Senior Kubernetes architecture involves balancing developer productivity with operational stability, security, and cost.

At a senior level, you aren't just 'using' K8s; you are extending it. This includes writing Custom Controllers (Operators), managing complex networking with Service Meshes for mTLS, and implementing GitOps for immutable delivery. Performance optimization requires understanding Cgroup v2, CFS quotas, and how the Scheduler's scoring algorithm interacts with Node Affinity.