Dual CI/CD pipeline architecture for Korean fintech workloads spanning on-premise and AWS Seoul (ap-northeast-2), enforcing five-stage promotion gates with code review, SAST scanning, security approval, and 4-eyes sign-off before production deployment. Dev and Prod VPCs (10.10.0.0/16 and 10.20.0.0/16) connect via Transit Gateway, with Dev workstations accessing GitHub SaaS through VPN and Ops teams using Amazon Workspaces to trigger GitHub Enterprise Server builds. AWS CodeBuild, CodePipeline, Inspector, and GuardDuty provide automated security scanning and compliance enforcement, while an alarm chain integrates GuardDuty findings through EventBridge, Lambda, SNS, PagerDuty, and Slack for 24/7 incident response. This architecture demonstrates defense-in-depth for financial services: network segmentation (VLAN 10/20), identity federation (OIDC), least-privilege CI runners, and real-time threat detection. Fork and customize this diagram on Diagrams.so to adapt promotion gates, add additional approval workflows, or integrate with your own incident management tools.