Urgent Security Audit: 2-Hour Next.js / PostgreSQL Repository Review

Web Security, Software Testing, PostgreSQL, Stripe, Penetration Testing, Full Stack Development, Technical Documentation, Next.js, Security Auditing · We need a Senior Fullstack Security Engineer to perform an immediate, cold code audit on a private ZIP repository for a Proptech platform (Next.js 15 monolithic architecture, PostgreSQL database, and Stripe Sandbox Integration).

This is a pure white-box security audit. Your task will take approximately 2 hours of technical review. We do not require any coding or feature implementation.

You must strictly audit the following parameters:

1. Stripe Webhook Security: Verify that the endpoint securely processes transaction events and check for vulnerabilities or bypass risks.

2. Role-Based Access Controls (RBAC): Audit the PostgreSQL database logic implementing the 7-tier role architecture to ensure clean fallback triggers (degrading failed payments to free roles instantly).

3. Code Hygiene: Scan the repository for hidden loops, potential backdoors, or hardcoded sensitive variables.

Deliverables: A clean, 1-page flat summary report confirming if the backend structure is production-ready and fully secure.

Budget is fixed at €30.00 net. Do not bid if you do not agree with this fixed budget. The repository is available immediately for review. We expect the report within 3 hours maxim