Express app built with GPT Engineer? Let’s review it.
Expert code review for Express apps built with GPT Engineer. We find GPT Engineer-specific bugs, fix Express security issues, and optimize performance. From $19.
GPT Engineer issues we find in Express projects
Problems specific to GPT Engineer's code generation patterns when building Express apps.
No authentication system
GPT Engineer generates functional UIs but typically skips authentication entirely. All routes and data are publicly accessible.
Direct database access from client
Some generated apps query databases directly from the frontend without an API layer, exposing database credentials and structure.
Incomplete feature implementations
Features that look complete in the UI but don't actually work end-to-end. Buttons that don't submit, forms that don't save, and links that go nowhere.
Missing error boundaries
A single component error crashes the entire application. No error boundaries or fallback UIs to gracefully handle failures.
Express issues we check for
Common Express problems that affect production readiness.
No helmet middleware for security headers
Express apps without the helmet middleware are missing critical security headers like Content-Security-Policy, X-Content-Type-Options, and HSTS, leaving the app vulnerable to common web attacks.
Missing input validation and sanitization
Request body, query params, and URL params used directly without validation. No express-validator, zod, or joi — enabling injection attacks and unexpected crashes.
Unstructured error handling
No global error-handling middleware. Errors either crash the process, leak stack traces to clients, or get silently swallowed with no logging.
CORS set to allow all origins
The cors() middleware called with no options, defaulting to allowing requests from any website — a security risk for APIs that handle user data.
Start with a self-serve audit
Get a professional review of your GPT Engineer Express project at a fixed price.
External Security Scan
Black-box review of your public-facing app. No code access needed.
- OWASP Top 10 vulnerability check
- SSL/TLS configuration analysis
- Security header assessment
- Expert review within 24h
Code Audit
In-depth review of your source code for security, quality, and best practices.
- Security vulnerability analysis
- Code quality review
- Dependency audit
- Architecture review
- Expert + AI code analysis
Complete Bundle
Both scans in one package with cross-referenced findings.
- Everything in both products
- Cross-referenced findings
- Unified action plan
100% credited toward any paid service. Start with an audit, then let us fix what we find.
Frequently asked questions
Can you review Express code generated by GPT Engineer?
Yes. We regularly audit Express projects built with GPT Engineer and understand the specific patterns and issues it introduces. Our review covers security, performance, and deployment readiness.
What Express issues does GPT Engineer typically create?
Common issues in GPT Engineer-generated Express code include: no authentication system, direct database access from client, incomplete feature implementations. Combined with Express-specific concerns like no helmet middleware for security headers and missing input validation and sanitization.
How do I make my GPT Engineer Express project production-ready?
Start with our code audit ($19) to get a prioritized list of issues. For GPT Engineer-built Express projects, the typical path is: fix security gaps, address Express-specific performance issues, then configure deployment. We provide a fixed quote after the audit.
How much does it cost to review GPT Engineer-generated Express code?
Our code audit starts at $19 and covers security, performance, architecture, and deployment readiness. For fixes, our Fix & Ship plan is $199. Larger projects get a custom fixed quote — no hourly billing or surprises.
Related resources
Need help with your GPT Engineer Express project?
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