Building a marketplace with NestJS? Let us review it.
Expert code review for marketplace apps built with NestJS. We fix NestJS-specific security gaps, optimize performance, and handle deployment. From $19.
Common NestJS issues we find
Real problems from NestJS codebases we've reviewed.
Missing authentication guards
Controllers and routes without @UseGuards decorators, leaving endpoints publicly accessible without any auth checks.
Incorrect dependency injection scope
Services registered with wrong scope (default singleton vs request-scoped) causing shared state between requests and data leakage between users.
Unvalidated DTOs
Data Transfer Objects without class-validator decorators or missing the global ValidationPipe, accepting any shape of input data.
Circular dependency issues
Modules importing each other in cycles, causing runtime errors or undefined injections that only surface in production.
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 NestJS 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 NestJS 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 NestJS?
Yes. We regularly audit NestJS 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 NestJS marketplace apps?
Common issues include missing authentication guards and incorrect dependency injection scope on the NestJS 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 NestJS marketplace production-ready?
Start with our code audit ($19) to get a prioritized list of issues. For NestJS marketplace projects, the typical path is: fix security gaps, address marketplace-specific requirements, optimize NestJS performance, then configure deployment. We provide a fixed quote after the audit.
How long does it take to audit a NestJS marketplace?
Our code audit delivers a full report within 24 hours. For NestJS marketplace projects, we check security, architecture, performance, and deployment readiness across all NestJS-specific patterns. Fixes are scoped separately with a fixed quote.
Related resources
NestJS by Use Case
Need help with your NestJS marketplace?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.