Zero-trust backoffice access architecture for third parties using AWS CloudFront, WAF, API Gateway, and AI-powered guardrails to enforce identity verification, least-privilege authorization, and real-time threat detection. Third-party requests flow through OIDC/SAML MFA identity provider, CloudFront CDN with OWASP-managed WAF rules, and API Gateway as policy enforcement point before reaching ECS Fargate broker services across multi-AZ deployment. Lambda authorization engine, AI prompt/output filtering, and anomaly detection monitoring ensure sanitized access to RDS, DynamoDB, and vector databases while maintaining encrypted secrets and audit trails. This architecture demonstrates defense-in-depth for regulated backoffice systems, combining network segmentation, encryption, and AI-driven content filtering to minimize insider and supply-chain risk. Fork and customize this diagram on Diagrams.so to adapt zero-trust controls for your third-party access requirements.