Shopify code review, theme optimization, and custom app development
Shopify powers millions of online stores, and many founders use AI tools to build custom themes, apps, and integrations. Cursor, Claude Code, and GitHub Copilot are commonly used to customize Shopify stores — but AI-generated Liquid templates, custom apps, and API integrations often have performance, security, and checkout issues that hurt conversions.
Common Shopify issues we find
Real problems from Shopify codebases we've reviewed.
Slow theme performance
AI-generated Liquid templates with too many nested loops, unoptimized images, render-blocking scripts, and missing lazy loading — increasing page load time and hurting conversion rates.
Broken checkout customizations
Custom checkout scripts or Shopify Functions that break the checkout flow for certain payment methods, shipping options, or edge cases like discount stacking.
Insecure custom app webhooks
Shopify app webhook endpoints without HMAC signature verification, allowing attackers to send fake order, payment, or customer data to your systems.
API rate limit violations
Custom integrations that hit Shopify's API rate limits by making too many requests without proper throttling, causing sync failures and data inconsistencies.
Exposed Storefront API tokens
Storefront API tokens used with excessive scopes, or Admin API tokens accidentally included in client-side code, giving unauthorized access to store data.
Theme accessibility failures
Custom themes missing ARIA labels, keyboard navigation, color contrast compliance, and screen reader support — potentially violating ADA requirements.
Missing mobile responsiveness
AI-generated theme sections that look great on desktop but break on mobile devices, where the majority of e-commerce traffic now comes from.
No staging or version control for themes
Theme changes made directly to the live store without a development theme, version control, or rollback plan. One bad change affects all customers immediately.
Shopify production checklist
Key checks before deploying your Shopify app.
Theme Lighthouse performance score above 70
All images lazy-loaded and properly sized
Webhook endpoints verify Shopify HMAC signatures
API integrations handle rate limits with retry logic
Admin API tokens stored server-side only
Theme fully responsive across mobile, tablet, and desktop
Checkout flow tested across payment methods and edge cases
Theme changes tested on development theme before publishing
Accessibility audit passing WCAG 2.1 AA standards
Version control set up for theme files
Not sure if your app passes? Our code audit ($19) checks all of these and more.
Our Shopify services
Security Review
Deep security analysis of your application — from API endpoints to database access.
Fix Bugs
We diagnose and fix bugs in AI-generated apps — from mysterious crashes to features that just don't work right.
Performance
Identify and fix performance bottlenecks — slow page loads, laggy interactions, and expensive operations.
Add Features
New functionality, integrations, and capabilities that your AI tool couldn't build or that you need built properly.
AI tools that generate Shopify code
Start with a self-serve audit
Get a professional review of your Shopify 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
Can you optimize my Shopify store's speed?
Yes. We optimize Liquid templates, defer non-critical scripts, compress images, implement lazy loading, and reduce render-blocking resources. Faster stores directly increase conversion rates.
Is my custom Shopify app secure?
If it was vibe coded with an AI tool, it likely has webhook verification gaps, token exposure risks, and missing input validation. We audit custom apps and integrations for Shopify-specific security issues.
Can you build custom Shopify integrations?
Yes. We build and review custom Shopify apps, theme sections, checkout extensions, and third-party integrations. We ensure they're secure, performant, and follow Shopify's best practices.
Related resources
Need help with your Shopify project?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.