Version numbers should encode compatibility, not vibes. Learn semantic versioning, the Conventional Commits spec, commitlint enforcement, and fully automated releases with semantic-release and Release Please.
Container images carry hundreds of dependencies you didn't write. Learn how to scan them with Trivy, Grype, Snyk, and Docker Scout, manage false positives, choose minimal base images, and automate dependency updates.
Monorepo CI should only build what changed. Learn affected-service detection with git diff, Nx, Turborepo, and Bazel, plus remote caching, shared library versioning, and practical GitHub Actions configurations.
Feature flags let you deploy code to production without exposing it to users. Learn the different flag types, build a flag system from scratch, compare LaunchDarkly vs Unleash, and manage the technical debt that comes with flag sprawl.
Canary deployments route a small percentage of traffic to the new version, catching problems before they affect everyone. Learn implementation with Nginx, Argo Rollouts, Flagger, and feature flags.
Blue-green deployments eliminate downtime by running two identical environments and switching traffic instantly. Learn the pattern with Kubernetes, AWS CodeDeploy, and Nginx, plus how to handle the tricky part: database migrations.
Master Helm charts: chart anatomy, Go templating, values overrides, public registries, release management, lifecycle hooks. Plus when to use Kustomize instead.
Understand service mesh architecture with sidecar proxies and the data/control plane split. A detailed Istio vs Linkerd comparison covering performance, complexity, features, and when a mesh is justified.
Understand Kubernetes resource requests vs limits, QoS classes, OOM kills, CPU throttling, VPA auto-tuning, and namespace quotas. The configuration that decides if your Pod lives or dies.
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