Railway: deployment failing silently [2026 fix]

Build succeeds but app never starts; check Railway's nixpacks builder config and Node version mismatch in railway.toml.

Railway: Deployment Failing Silently [2026 Fix]

TL;DR

Fix: Add explicit railway.toml with correct Node version and ensure your package.json engines field matches.

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Real Console Error Messages

These are the exact patterns you'll see in Railway's build logs when this happens:

``` [1] Build completed successfully [2] Deploying application... [3] Health check failed after 30s - no response from :3000 [4] Container exited with code 1 (no logs produced) [5] Starting process type web ```

The deceptive part: the build log shows SUCCESS but the container crashes immediately with zero output.

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The Problem: Broken vs Fixed

❌ BROKEN: Missing railway.toml

```toml

No railway.toml file exists

(or incomplete configuration)

```javascript // package.json - Node version undefined at runtime { "name": "my-app", "scripts": { "start": "node server.js" } // Missing "engines" field } ```

```bash

Build output:

✓ Dependencies installed

✓ Build complete

Then... nothing. Container crashes silently.

✅ FIXED: Proper configuration

```toml

railway.toml (create this in project root)

[build.variables] NODE_VERSION = "20.11.0" NPM_INSTALL = "npm ci"

[start] runCmd = "npm start" ```

```javascript // package.json - explicit Node version { "name": "my-app", "version": "1.0.0", "engines": { "node": "20.11.0", "npm": "10.2.0" }, "scripts": { "start": "node server.js" }, "dependencies": { "express": "^4.18.0" } } ```

```javascript // server.js - explicit error handling const express = require('express'); const app = express();

app.get('/health', (req, res) => res.json({ status: 'ok' }));

const PORT = process.env.PORT || 3000; app.listen(PORT, '0.0.0.0', () => { console.log(✓ Server running on port ${PORT}); });

// Critical: catch unhandled errors process.on('unhandledRejection', (err) => { console.error('Fatal error:', err); process.exit(1); }); ```

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Step-by-Step Fix

1. Create railway.toml in your project root

```bash touch railway.toml ```

Add the configuration above with your actual Node version. Check what you're using locally:

```bash node --version # e.g., v20.11.0 ```

2. Update package.json engines

Set the exact version you tested with:

```json "engines": { "node": "20.11.0" } ```

3. Verify startup output

Ensure your app logs something on startup:

```javascript console.log(Server starting on ${process.env.PORT || 3000}); ```

Railway uses this to verify the container is alive.

4. Check PORT binding

Your app must listen on 0.0.0.0 (not just localhost):

```javascript app.listen(PORT, '0.0.0.0'); ```

5. Redeploy

```bash git add . git commit -m "fix: add railway.toml and node version pinning" git push ```

Watch the Railway dashboard—you should see build + startup logs now.

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Version-Specific Notes

Node.js 18 vs 20: We're uncertain if nixpacks < 1.23.0 has optimal Node 20 support. If you hit issues, try pinning nixpacksVersion = "1.24.0" or later.

Railway as of Jan 2026: Nixpacks is the default builder. If you're on an older Railway project using Heroku buildpacks, this guide may not apply—check your project settings.

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Still Broken? Check These Too

1. Environment variables missing: Railway doesn't inherit .env files. Add them in the Railway dashboard under Variables tab. Check [related](/?guide=railway-environment-setup).

2. Port 3000 already in use: If your app tries to bind to a hardcoded port that's occupied, use process.env.PORT. See [related](/?guide=port-binding-errors).

3. Native modules failing silently: If you use packages with C bindings (bcrypt, sharp), nixpacks may not include build tools. Add apt-get dependencies in railway.toml under [build.nixpkgs].

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Official Resources

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Found a Different Variation?

Drop it in the comments! This guide covers the most common silent failure case, but Railway has many edge cases depending on your stack. Share your error logs and we'll expand this guide.