Deployment Engineer Specialist in deployment automation, CI/CD pipelines, and infrastructure management. When This Skill Activates Activates when you: Set up deployment pipeline Configure CI/CD Manage releases Automate infrastructure CI/CD Pipeline Pipeline Stages stages : - lint - test - build - security - deploy - dev - deploy - staging - deploy - production GitHub Actions Example name : CI/CD on : push : branches : [ main , develop ] pull_request : branches : [ main ] jobs : lint : runs-on : ubuntu - latest steps : - uses : actions/checkout@v4 - uses : actions/setup - node@v4 with : node-version : '20' - run : npm ci - run : npm run lint test : runs-on : ubuntu - latest needs : lint steps : - uses : actions/checkout@v4 - uses : actions/setup - node@v4 - run : npm ci - run : npm test build : runs-on : ubuntu - latest needs : test steps : - uses : actions/checkout@v4 - uses : actions/setup - node@v4 - run : npm ci - run : npm run build - uses : actions/upload - artifact@v4 with : name : build path : dist/ deploy-production : runs-on : ubuntu - latest needs : build if : github.ref == 'refs/heads/main' environment : production steps : - uses : actions/checkout@v4 - uses : actions/download - artifact@v4 with : name : build path : dist/ - run : npm run deploy Deployment Strategies 1. Blue-Green Deployment ┌─────────┐ │ Load │ │ Balancer│ └────┬────┘ │ ┌────────┴────────┐ │ Switch │ ├────────┬────────┤ ▼ ▼ ▼ ┌─────┐ ┌─────┐ ┌─────┐ │Blue │ │Green│ │ │ └─────┘ └─────┘ └─────┘ 2. Rolling Deployment ┌─────────────────────────────────────┐ │ v1 v1 v1 v1 v1 v1 v1 v1 v1 │ → Old │ v2 v2 v2 v2 v2 v2 v2 v2 v2 │ → New └─────────────────────────────────────┘ ▲ ▲ │ │ Start End 3. Canary Deployment ┌──────────────────────────────────────┐ │ v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 │ → Old │ v2 v2 v2 v2 │ → Canary (5%) └──────────────────────────────────────┘ Monitor metrics, then: │ v1 v1 v1 v1 │ → Old (50%) │ v2 v2 v2 v2 v2 v2 v2 v2 v2 v2 │ → New (50%) Environment Configuration Environment Variables

Production

NODE_ENV

production DATABASE_URL = postgresql:// .. . API_KEY = sk- .. . SENTRY_DSN = https://example.com/123

Development

NODE_ENV

development DATABASE_URL = postgresql://localhost:5432/dev Configuration Management // config/production.ts export default { database : { url : process . env . DATABASE_URL , poolSize : 20 , } , redis : { url : process . env . REDIS_URL , } , } ; Health Checks // GET /health app . get ( '/health' , ( req , res ) => { const health = { status : 'ok' , timestamp : new Date ( ) . toISOString ( ) , checks : { database : 'ok' , redis : 'ok' , external_api : 'ok' , } , } ; if ( Object . values ( health . checks ) . some ( v => v !== 'ok' ) ) { health . status = 'degraded' ; return res . status ( 503 ) . json ( health ) ; } res . json ( health ) ; } ) ; Rollback Strategy

Kubernetes

kubectl rollout undo deployment/app

Docker

docker-compose down docker-compose up -d --scale app = < previous-version

Git

git revert HEAD git push Monitoring & Logging Metrics to Track Deployment frequency Lead time for changes Mean time to recovery (MTTR) Change failure rate Logging // Structured logging logger . info ( 'Deployment started' , { version : process . env . VERSION , environment : process . env . NODE_ENV , timestamp : new Date ( ) . toISOString ( ) , } ) ; Scripts Generate deployment config: python scripts/generate_deploy.py < environment

Validate deployment: python scripts/validate_deploy.py References references/pipelines.md - CI/CD pipeline examples references/kubernetes.md - K8s deployment configs references/monitoring.md - Monitoring setup