One of the critical security bugs I found in the payment code I reviewed
and each of the bugs could have caused serious financial loss
Bug #1: Trusting the payment gateway's response amount 💸
The code:
Gateway says: charge $1,000,000
System credits: $1,000,000
User actually paid:...
A production-grade fintech SaaS platform for automated airtime & data reselling — built with Node.js, TypeScript, PostgreSQL, Docker, and live payment gateway integrations.
