Enterprise microservices architecture spanning five security zones: DMZ with WAF and DDoS protection, application layer with API Gateway and Camunda BPM, data zone hosting core banking and document systems, and dedicated security/monitoring infrastructure. Traffic flows from web and mobile clients through F5/Nginx WAF and reverse proxy into Tomcat/.NET API Gateway, which orchestrates Camunda workflows, PDF generation, and core banking calls via service mesh with mTLS encryption. All components log to CloudTrail and feed into Security Hub/OpenSearch SIEM, with GuardDuty threat detection, IAM controls, and KMS encryption securing the entire stack. This segmented design isolates blast radius, enforces least-privilege access, and provides audit trails critical for financial compliance. Fork and customize this diagram on Diagrams.so to match your institution's zone topology, add additional microservices, or integrate alternative message brokers and databases. The five-zone pattern is ideal for regulated industries requiring strict network segmentation and comprehensive security monitoring.