Apache Flink

Series Navigation: This is Part 7 of the Core Banking Systems Architecture Masterclass. ← Previous: Part 6 — FAPI 2.0 Security | Master Curriculum Hub | Next: Part 8 — QA & SDET Testing Handbook → | Core Banking Hub | Alipay High-Concurrency Architecture Part 7: Streaming Fraud Detection: Go 1.25 Engine, Flink CEP & RocksDB Answer-first: Modern core banking fraud systems deploy a dual-layer defense topology: an inline Go wire micro-engine evaluating lock-free sliding velocity windows under 2 milliseconds directly in payment authorization, paired with an asynchronous Apache Flink CEP cluster backed by RocksDB state for multi-week behavioral mining. This architecture intercepts account takeover and money mule routing inline before funds settle across instant clearing rails. ...

Core Banking Systems Architecture Masterclass Guide Answer-first: Modern cloud-native core banking transitions from batch-driven mainframes to composable distributed platforms: immutable double-entry ledgers enforcing mathematical zero-drift balance invariants, multi-region Distributed SQL guaranteeing serializable ACID transactions, event-sourced CQRS projections, orchestrated compensation Sagas, zero-allocation ISO 20022 streaming, and FAPI 2.0 security. This architecture eliminates end-of-day batch freezes, delivering sub-25ms P99 latency across active-active deployments. Prerequisite: Practical familiarity with distributed systems fundamentals, relational transaction isolation levels (ACID), event-driven microservice patterns, and enterprise networking (mTLS, TCP/IP, gRPC). For foundational context, explore our Banking Microservices Architecture and Go Microservices Guide. ...