Building a marketplace with Flask? Let us review it.
Expert code review for marketplace apps built with Flask. We fix Flask-specific security gaps, optimize performance, and handle deployment. From $19.
Common Flask issues we find
Real problems from Flask codebases we've reviewed.
Debug mode in production
Flask's built-in debugger left enabled in production, exposing an interactive console that allows remote code execution on the server.
Hardcoded secret key
SECRET_KEY set to a default or short string like 'secret' instead of a cryptographically random value loaded from environment variables.
No CSRF protection
Forms and state-changing endpoints without Flask-WTF CSRF tokens, enabling cross-site request forgery attacks.
Running with flask run in production
Using Flask's development server in production instead of gunicorn or uWSGI, which is single-threaded and not designed for real traffic.
Marketplace challenges to solve
Key marketplace concerns that AI-generated code often misses.
Payment splitting and payouts
Buyers pay, the platform takes a cut, sellers receive the rest. This requires Stripe Connect or similar — significantly more complex than basic checkout. AI tools rarely implement this correctly, leaving you with manual payout processes.
Two-sided authorization
Sellers can manage their listings but not other sellers'. Buyers can view listings but only manage their own orders. Admins can moderate everything. Three distinct permission levels, all enforced server-side.
Trust and safety
Reviews, ratings, dispute resolution, content moderation, and fraud detection. These are complex systems that AI tools don't generate but that make or break a marketplace.
Search and discovery
Users need to find what they're looking for. Basic database queries won't cut it at scale — you need full-text search, filters, sorting, and potentially geolocation. This requires proper indexing or a dedicated search service.
What we check
Key areas we review for Flask marketplace projects.
Payment flow — Stripe Connect setup, split payments, seller payouts
Authorization — buyer vs seller vs admin permissions enforced server-side
Data integrity — race conditions, inventory management, order state machines
Search performance — indexing, query optimization, full-text search
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 Flask marketplace 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 marketplace built with Flask?
Yes. We regularly audit Flask marketplace 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 Flask marketplace apps?
Common issues include debug mode in production and hardcoded secret key on the Flask side, combined with marketplace-specific concerns like payment splitting and payouts and two-sided authorization. We check for all of these and more.
How do I make my Flask marketplace production-ready?
Start with our code audit ($19) to get a prioritized list of issues. For Flask marketplace projects, the typical path is: fix security gaps, address marketplace-specific requirements, optimize Flask performance, then configure deployment. We provide a fixed quote after the audit.
How long does it take to audit a Flask marketplace?
Our code audit delivers a full report within 24 hours. For Flask marketplace projects, we check security, architecture, performance, and deployment readiness across all Flask-specific patterns. Fixes are scoped separately with a fixed quote.
Related resources
Flask by Use Case
Need help with your Flask marketplace?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.