Our team embeds security into everyday development by treating it as a shared responsibility and automating it wherever possible. Every commit passes through static code analysis, dependency vulnerability scanning, and secret detection in the CI pipeline, with builds failing on critical issues. Container images are scanned before promotion, and infrastructure-as-code templates are validated against security policies. We enforce least-privilege access using role-based controls and manage secrets through a centralized vault. Pull requests require both peer review and, for sensitive components, security sign-off. Runtime protections include WAF rules, hardened configurations, and continuous monitoring of logs and anomalies. Regular threat modeling, developer security training, and periodic penetration tests have significantly reduced misconfigurations, vulnerable libraries, and production incidents related to security gaps.