Multi-tier digital banking architecture built on Thought Machine Vault Core spans presentation, application, and data layers across two availability zones for high availability. Banking customers access mobile apps through a public subnet with WAF, CDN, and API Gateway routing to load balancers that distribute traffic to private subnets hosting Vault Core's thin core engine. Domain-driven design separates Payments, Lending, Cards, and Accounts domains, each with dedicated sub-ledgers feeding a centralized General Ledger in the financial domain layer. Data Hub ETL processes stream transactions to a Data Warehouse and Analytics DB powering the Reporting Service, enabling real-time financial insights. Fork this Thought Machine Vault Core reference architecture on Diagrams.so to customize domain boundaries, add regulatory compliance controls, or model your bank's specific product catalog.