Clients CDN WAF + API Gateway (OIDC/OAuth2, schema, bot mgmt)

Payments Core Payment Orchestrator Ledger DB Settlement & Reconciliation (idempotency, ACID)

Secrets / Crypto KMS/HSM Token Vault (PAM+Token) (keys, signing, wrapping)

Risk & Fraud UEBA + Rules + ML Graph (user-device-merchant)

Data / Analytics Kafka/Event Bus Operational DBs Data Lake/Warehouse (masked/tokenized views) ETL/ELT, Catalog & Classification, DLP Jobs