Zero-Downtime Deployments: Our Complete CI/CD Playbook

Deploying to production should be boring. If your team dreads deployments, something is wrong. Here is how we achieve zero-downtime deployments across all client projects, with pipelines that go from commit to production in under 10 minutes. The foundation: trunk-based development with feature flags. We deploy to main multiple times a day. Feature flags control what users see, allowing safe rollback without redeployment. Our pipeline has five stages: lint and type-check (30s), unit tests (2m), integration tests (3m), staging deploy with smoke tests (2m), and production canary deploy (3m). If any stage fails, the pipeline stops. Canary deploys are critical. We roll out to 5% of traffic first, monitor error rates and latency for 5 minutes, then gradually increase. If metrics degrade, automatic rollback kicks in. Infrastructure as code with Terraform means every environment is reproducible. No "works on my machine" — if it passes CI, it works in production. The result: 150+ deployments per month with zero downtime incidents. Deployments are routine, not events.