Q: As an experienced DevSecOps engineer or architect, how do you design and enforce a zero-trust software delivery pipeline from developer commit to Kubernetes runtime without slowing down developer velocity?

Prevent secrets and misconfigurations before code ever reaches remote repositories:

• Secret Scanning: Enforce local pre-commit hooks using TruffleHog / Gitleaks to block commits containing API keys, AWS tokens, or private certificates.
• Branch Protection & SAST: Mandate PR checks running Semgrep / SonarQube for Static Application Security Testing (SAST) with quality gates blocking OWASP Top 10 vulnerabilities (SQLi, SSRF, XSS).

Securing open-source third-party dependencies and container base images:

• Dependency Scanning: Run Snyk / Trivy SCA to audit npm, pip, go.mod packages. Prioritize triage using EPSS (Exploit Prediction Scoring System) rather than CVSS alone.
• Minimal Distroless Images: Mandate Google Distroless or Chainguard Wolfi base images containing zero shell binaries (no /bin/sh, curl, or package managers), slashing container attack surfaces by 90%.

Preventing tampering between build artifacts and production deployments:

• SBOM Generation: Automatically generate an SPDX / CycloneDX Software Bill of Materials (SBOM) using Syft during CI builds.
• Keyless Artifact Signing: Cryptographically sign container images using Sigstore Cosign via GitHub Actions OIDC federation, eliminating long-lived private signing keys.
• SLSA Provenance: Generate SLSA Level 3 build attestations capturing git commit SHA, runner identity, and build parameters.

Enforcing security policies before any Pod manifest is accepted by kube-apiserver:

• Image Signature Verification: Reject any container image lacking a valid Cosign cryptographic signature from the trusted corporate OIDC identity.
• Pod Security Standards: Enforce restricted profile: disallow root users (runAsNonRoot: true), enforce read-only root filesystems, drop all Linux capabilities (drop: ['ALL']), and forbid hostPath mounts.

Protecting against zero-day exploits and post-exploitation activity in running clusters:

• Kernel-Level Visibility: Deploy Falco via eBPF probes to detect anomalous system calls (e.g. bash spawned inside a container, /etc/passwd modification, unexpected outbound network connections).
• Automated Remediation: Forward Falco security events via Falcosidekick to EventBridge and Lambda to automatically quarantine compromised pods or cordon nodes.