Building a fintech app with Shopify? Let us review it.
Expert code review for fintech apps built with Shopify. We fix Shopify-specific security gaps, optimize performance, and handle deployment. From $19.
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.
Fintech App challenges to solve
Key fintech app concerns that AI-generated code often misses.
Data encryption and storage
Financial data must be encrypted at rest and in transit. Account numbers, transaction histories, and personally identifiable financial information need field-level encryption, not just HTTPS. AI tools store financial data in plain text in the database, which is a compliance violation waiting to happen.
Transaction integrity
Financial transactions must be atomic — money debited from one account must be credited to another, with no in-between state where it disappears. AI-generated code doesn't use database transactions, meaning a server crash mid-operation can leave accounts in an inconsistent state.
Audit trail and compliance
Every financial action needs an immutable log — who initiated it, when, what changed, and what the balances were before and after. Regulators require this. AI tools don't generate audit logging, and retrofitting it into an existing codebase is tedious but essential.
Third-party financial API integration
Connecting to Plaid, Stripe, or banking APIs requires handling OAuth flows, webhook verification, idempotency keys, and retry logic for failed calls. AI tools generate the initial API call but miss the error handling and reliability patterns these services require.
What we check
Key areas we review for Shopify fintech app projects.
Data encryption — field-level encryption for sensitive financial data
Transaction integrity — atomic operations, no partial state changes
Audit logging — immutable records of every financial action
Authentication — MFA, session management, account lockout policies
Not sure if your app passes? Our code audit ($19) checks all of these and more.
Start with a self-serve audit
Get a professional review of your Shopify fintech app 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.
How it works
Tell us about your app
Share your project details and what you need help with.
Expert + AI audit
A human expert assisted by AI reviews your code within 24 hours.
Launch with confidence
We fix what needs fixing and stick around to help.
Frequently asked questions
Can you review a fintech app built with Shopify?
Yes. We regularly audit Shopify fintech app projects and understand the specific patterns and pitfalls of this combination. Our review covers security, performance, and deployment readiness.
What issues do you find in Shopify fintech apps?
Common issues include slow theme performance and broken checkout customizations on the Shopify side, combined with fintech app-specific concerns like data encryption and storage and transaction integrity. We check for all of these and more.
How do I make my Shopify fintech app production-ready?
Start with our code audit ($19) to get a prioritized list of issues. For Shopify fintech app projects, the typical path is: fix security gaps, address fintech app-specific requirements, optimize Shopify performance, then configure deployment. We provide a fixed quote after the audit.
How long does it take to audit a Shopify fintech app?
Our code audit delivers a full report within 24 hours. For Shopify fintech app projects, we check security, architecture, performance, and deployment readiness across all Shopify-specific patterns. Fixes are scoped separately with a fixed quote.
Related resources
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