To secure a Bolt.new + Railway stack, configure your environment variables through the Railway dashboard with variable references for linked services, and keep database connections on private networking so they're never exposed publicly. Separate services to limit blast radius, and make sure service-to-service traffic stays on internal URLs. This blueprint covers container-based deployment security on Railway.
TL;DR
Railway makes deployment easy, databases included, but that convenience hides a few traps. Configure environment variables in the dashboard, not in code. Use private networking for database connections, keep services separated by concern, and never expose an internal service URL publicly.
Railway Security Features
| Feature | Security Benefit | Configuration |
|---|---|---|
| Private networking | Internal-only communication | Use internal URLs |
| Environment variables | Secret management | Railway dashboard |
| Service isolation | Limit blast radius | Separate services |
| Database plugins | Managed security | One-click setup |
Part 1: Railway Environment Variables
# Database (auto-configured if using Railway database)
DATABASE_URL=${{Postgres.DATABASE_URL}}
# External services
SUPABASE_URL=https://xxx.supabase.co
SUPABASE_SERVICE_ROLE_KEY=eyJ...
# Application
JWT_SECRET=your-secret
NODE_ENV=production
Use Railway's variable references: For Railway-hosted databases, use ${{ServiceName.VARIABLE}} syntax to automatically inject credentials.
Part 2: Railway Service Architecture
Railway Project
├── web (frontend)
│ └── Public domain
│ └── No sensitive env vars
├── api (backend)
│ └── Private or public domain
│ └── DATABASE_URL, secrets
├── postgres (database)
│ └── Private networking only
│ └── No public access
└── redis (cache, optional)
└── Private networking only
Part 3: Railway Private Networking
# Public URL (for external access)
https://api-production-xxxx.up.railway.app
# Internal URL (for service-to-service)
api.railway.internal:3000
# Database (always use internal)
postgres.railway.internal:5432
Security Checklist
Railway Deployment Checklist
Environment variables in Railway dashboard
No hardcoded secrets in code
Database uses private networking
Services appropriately isolated
Internal URLs for service communication
.env files in .gitignore
Healthcheck endpoints configured
Alternative Stacks to Consider
**Bolt.new + Vercel**
Serverless deployment alternative
**Bolt.new + Netlify**
JAMstack deployment
**Bolt.new + Supabase**
External database option
Should I use Railway's database or external?
Railway's own databases are convenient and default to private networking, so you don't have to think about it. Go external (Supabase, PlanetScale) and you get more features, but now you're the one managing the connection string securely.
How do I secure inter-service communication?
Use Railway's private networking with internal URLs. Services on the same project can communicate via servicename.railway.internal without exposing endpoints publicly.
Deploying Bolt to Railway?
Scan for configuration issues and exposed secrets.