How I think about security.

I came up as a penetration tester — prototype pollution, OWASP Top 10, business-logic flaws, SQLi/XSS/CSRF/auth-bypass — so I design defensively from the start. In production that means input validation, authentication hardening, CSP headers, and secure API design baked into the architecture rather than bolted on afterward. Knowing exactly how systems are exploited is what lets me build ones that hold up.