Next.js development, security, and deployment services
Next.js is the default output for Cursor, v0, and many AI tools. Its server-side features (API routes, server actions, middleware) are powerful but frequently misconfigured by AI-generated code.
Common Next.js issues we find
Real problems from Next.js codebases we've reviewed.
Unprotected API routes
Next.js API routes and server actions without authentication checks, allowing anyone to call them directly.
Server action data exposure
Server actions that return sensitive data to the client or don't validate user permissions before modifying data.
Incorrect middleware configuration
Auth middleware that doesn't cover all protected routes, uses wrong matchers, or can be bypassed with URL manipulation.
Missing ISR/SSG configuration
Pages that should be statically generated are server-rendered on every request, causing unnecessary load and slower responses.
Hydration errors
Server/client rendering mismatches from date formatting, conditional rendering, or accessing browser APIs during SSR.
Improper data fetching patterns
Client-side fetching where server components could be used, or waterfall requests that load data sequentially instead of in parallel.
Missing error.tsx and loading.tsx
No error or loading boundaries at route segments, causing poor user experience during navigation.
Environment variable misconfiguration
Server-only secrets prefixed with NEXT_PUBLIC_, or missing variables causing runtime crashes in production.
Next.js production checklist
Key checks before deploying your Next.js app.
All API routes and server actions require authentication
Middleware covers all protected route segments
Server-only secrets NOT prefixed with NEXT_PUBLIC_
Static pages use generateStaticParams where possible
error.tsx at root and critical route segments
loading.tsx for routes with data fetching
Server components used for data fetching (no unnecessary client components)
next.config properly configured for production
Image optimization with next/image
Proper caching headers on API responses
Not sure if your app passes? Our code audit ($19) checks all of these and more.
Our Next.js services
Security Review
Deep security analysis of your application — from API endpoints to database access.
Deploy & Ship
From local development to production deployment.
Refactor Code
Clean up messy, duplicated, and hard-to-maintain code without breaking what already works.
Performance
Identify and fix performance bottlenecks — slow page loads, laggy interactions, and expensive operations.
AI tools that generate Next.js code
Start with a self-serve audit
Get a professional review of your Next.js project at a fixed price.
Security Scan
Black-box review of your public-facing app. No code access needed.
- OWASP Top 10 checks
- SSL/TLS analysis
- Security headers
- Expert review within 24h
Code Audit
In-depth review of your source code for security, quality, and best practices.
- Security vulnerabilities
- Code quality review
- Dependency audit
- AI pattern 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.
How it works
Tell us about your app
Share your project details and what you need help with.
Get a clear plan
We respond in 24 hours with scope, timeline, and cost.
Launch with confidence
We fix what needs fixing and stick around to help.
Frequently asked questions
Is Next.js App Router or Pages Router better?
App Router is the recommended approach for new projects. Most AI tools generate App Router code. If your app uses Pages Router, we can help migrate or optimize it.
How do I secure Next.js API routes?
Every API route needs auth verification, input validation, rate limiting, and proper error handling. We implement all of these as part of our security review.
Can you deploy my Next.js app to Vercel?
Yes. Vercel is the ideal platform for Next.js. We handle environment setup, domain configuration, build optimization, and CI/CD pipeline.
Why is my Next.js app slow?
Common causes: client-side fetching instead of server components, missing static generation, no caching, large client bundles, and waterfall data requests. We diagnose and fix all of these.
Related resources
Need help with your Next.js project?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.