The fastest teams we work with all share one trait: they deploy multiple times per day without fear. The secret isn't cowboy coding — it's a rock-solid CI/CD pipeline that catches problems automatically. Here's how we build them.
The Pipeline Architecture
Every pull request triggers this sequence:
- Lint & Format Check — ESLint + Prettier catch style issues in seconds
- Type Check —
tsc --noEmitcatches type errors without building - Unit Tests — Vitest runs fast, isolated tests in parallel
- Integration Tests — Test API routes and database queries against a real Postgres
- Build — Next.js production build catches SSR errors and missing imports
- Preview Deploy — Vercel creates a unique URL for every PR
- Visual Regression — Playwright screenshots compared against baselines
GitHub Actions Configuration
We split our workflow into parallel jobs for speed. Linting, type-checking, and unit tests run simultaneously. Integration tests and build only run if those pass. The entire pipeline completes in under 4 minutes.
Key Optimizations
- Dependency caching — Cache
node_modulesand.next/cachebetween runs - Selective testing — Only run affected tests using
--changedflag - Matrix builds — Test on Node 18 and 20 in parallel
- Concurrency groups — Cancel outdated runs when new commits are pushed
Vercel Preview Deployments
Every PR gets its own URL. This is transformative for code review — reviewers can actually use the feature, not just read the code. We add a GitHub bot comment with the preview link and key pages to test.
Production Safety
Merging to main triggers automatic production deployment. But we add safeguards:
- Required reviews — At least one approval from a senior dev
- Branch protection — All checks must pass before merge
- Vercel rollback — One-click rollback to any previous deployment
- Health checks — Post-deploy smoke tests hit critical endpoints
Struggling with slow or unreliable deployments? Let us build you a pipeline that just works.
