Built a landing page / marketing site with GPT Engineer?
We'll make it production-ready.
Landing pages are your first impression. Speed, SEO, and conversion optimization matter more here than anywhere else — a slow landing page or broken form directly costs you customers. AI tools build visually appealing pages, but they often miss the technical details that determine whether your page ranks, loads fast, and converts visitors.
Landing Page / Marketing Site challenges in GPT Engineer apps
Building a landing page / marketing site with GPT Engineer is a great start — but these challenges need attention before launch.
Page speed
Landing pages must load in under 2 seconds. AI tools generate bloated CSS, unoptimized images, and unnecessary JavaScript that slow loading. A 1-second delay in load time reduces conversions by 7%.
SEO fundamentals
Missing meta descriptions, incorrect heading hierarchy, no Open Graph tags, no structured data, and no sitemap. AI tools build the visible content but skip the invisible SEO infrastructure.
Form handling
Your contact form, waitlist signup, or demo request form must work flawlessly. AI-generated forms often lack validation, error messages, success confirmations, and backend integration.
Mobile responsiveness
Over 60% of traffic is mobile. AI-generated layouts sometimes break on small screens — overlapping elements, unreadable text, and inaccessible buttons. Every pixel matters for conversion.
Analytics and tracking
You need to know where visitors come from, what they click, and where they drop off. AI tools don't set up analytics, conversion tracking, or UTM parameter handling.
What we check in your GPT Engineer landing page / marketing site
Common GPT Engineer issues we fix
Beyond landing page / marketing site-specific issues, these are GPT Engineer patterns we commonly fix.
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.
Start with a self-serve audit
Get a professional review of your GPT Engineer landing page / marketing site 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.
Frequently asked questions
Can I build a landing page / marketing site with GPT Engineer?
GPT Engineer is a great starting point for a landing page / marketing site. It handles the initial scaffolding well, but landing page / marketing site apps have specific requirements — page speed and seo fundamentals — that need professional attention before launch.
What issues does GPT Engineer leave in landing page / marketing site apps?
Common issues include: no authentication system, direct database access from client, incomplete feature implementations. For a landing page / marketing site specifically, these issues are compounded by the need for page speed.
How do I make my GPT Engineer landing page / marketing site production-ready?
Start with our code audit ($19) to get a clear picture of what needs fixing. For most GPT Engineer-built landing page / marketing site apps, the critical path is: security review, then fixing core flow reliability, then deployment. We provide a fixed quote after the audit.
Get your GPT Engineer landing page / marketing site production-ready
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.