What happens when you build a production-grade e-commerce system without a framework? You learn the hard way that AI is a tool, not an architect. After an AI refactoring error butchered 40% of my backend—and without a Git backup—I had to rebuild from the wreckage.

This session is a deep dive into "defensive engineering." We’ll move past the "rookie mistakes" and look at the raw mechanics of web security, transactional databases, and server routing. I’ll show you how I built a "fortress" using strict row-locking, multi-layered CAPTCHAs, and server-side session revocation—all without a single artisan command.

Small print:

Target Audience: Backend Developers, Software Engineering Students, and CTOs.

Technical Level: Intermediate.

Duration: 45 minutes.

Key Topics: Raw PHP/MySQL, Database Concurrency, Security Architecture.