Express app built with Claude Code? Let’s review it.
Expert code review for Express apps built with Claude Code. We find Claude Code-specific bugs, fix Express security issues, and optimize performance. From $19.
Claude Code issues we find in Express projects
Problems specific to Claude Code's code generation patterns when building Express apps.
Over-permissive CORS configuration
Claude Code sometimes sets CORS to allow all origins during development and forgets to restrict it for production, allowing any website to make API requests.
Missing rate limiting
API endpoints are generated without rate limiting, allowing attackers to brute-force auth endpoints or abuse expensive operations.
Over-engineered abstractions
Claude Code creates multiple layers of abstraction, generic utilities, and design patterns for simple problems — making the code harder to understand and maintain.
Edge cases in complex logic
While Claude handles the main flow well, complex conditional logic sometimes has edge cases that produce incorrect results with unusual inputs.
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 Claude Code 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 Claude Code?
Yes. We regularly audit Express projects built with Claude Code and understand the specific patterns and issues it introduces. Our review covers security, performance, and deployment readiness.
What Express issues does Claude Code typically create?
Common issues in Claude Code-generated Express code include: over-permissive cors configuration, missing rate limiting, over-engineered abstractions. Combined with Express-specific concerns like no helmet middleware for security headers and missing input validation and sanitization.
How do I make my Claude Code Express project production-ready?
Start with our code audit ($19) to get a prioritized list of issues. For Claude Code-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 Claude Code-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 Claude Code Express project?
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