Security is not a feature you bolt on at the end. It must be integrated into the development process from the start. The most common vulnerabilities arise from negligence, not from a lack of tools.
OWASP Top 10, Content Security Policy, and secure authentication are the bare minimum. Every developer should know these concepts inside and out.
Automated security scans in the CI/CD pipeline catch many issues early. Combined with regular code reviews, this creates a solid security culture.
