https://tanhdev.com/series/core-banking-architecture/Recent content in Modern Core Banking Architecture: From Double-Entry Ledger to Fintech Microservices on Lê Tuấn Anh — Go Backend Architect & Microservices Engineerhttps://tanhdev.com/vesviet.pnghttps://tanhdev.com/vesviet.pngHugoenThu, 18 Jun 2026 12:10:00 +0700https://tanhdev.com/series/core-banking-architecture/part-1-double-entry-ledger-schema/Thu, 18 Jun 2026 11:00:00 +0700https://tanhdev.com/series/core-banking-architecture/part-1-double-entry-ledger-schema/Real-world double-entry ledger schema: TigerBeetle Zig 128-byte struct, PostgreSQL NUMERIC(18,4), invariant enforcement triggers, and locking strategies for 1M TPS.https://tanhdev.com/series/core-banking-architecture/part-2-distributed-sql-acid-latency/Thu, 18 Jun 2026 11:10:00 +0700https://tanhdev.com/series/core-banking-architecture/part-2-distributed-sql-acid-latency/Distributed SQL ACID latency: Spanner TrueTime commit-wait 2-14ms, TiDB Percolator TSO 1-3ms, CockroachDB HLC. When should you migrate away from a PostgreSQL monolith?https://tanhdev.com/series/core-banking-architecture/part-3-event-sourcing-cqrs/Thu, 18 Jun 2026 11:20:00 +0700https://tanhdev.com/series/core-banking-architecture/part-3-event-sourcing-cqrs/Event Sourcing in Core Banking: PostgreSQL event store schema, CQRS balance <1ms vs O(N) SUM, Transactional Outbox with Debezium CDC — Monzo architecture.https://tanhdev.com/series/core-banking-architecture/part-4-saga-pattern/Thu, 18 Jun 2026 11:30:00 +0700https://tanhdev.com/series/core-banking-architecture/part-4-saga-pattern/Saga Pattern in Fintech: Choreography (5ms) vs Orchestration (50ms), Temporal Go workflows, failure transition matrices, and DLQ strategies for compensation failures.https://tanhdev.com/series/core-banking-architecture/part-5-iso-20022-payment-gateways/Thu, 18 Jun 2026 11:40:00 +0700https://tanhdev.com/series/core-banking-architecture/part-5-iso-20022-payment-gateways/ISO 20022 pacs.008: XPath→SQL mapping, streaming Go parser with O(1) memory, tiered idempotency lock (5 min→48 hours), XML-to-JSON gateway latency 1-11ms.https://tanhdev.com/series/core-banking-architecture/part-6-fapi-2-api-security/Thu, 18 Jun 2026 11:50:00 +0700https://tanhdev.com/series/core-banking-architecture/part-6-fapi-2-api-security/FAPI 2.0 DPoP: Node.js ES256 JWT generation, Go verification, mTLS Kubernetes 1-3ms vs <0.1ms pooled, PAR flow, and token replay protection.https://tanhdev.com/series/core-banking-architecture/part-7-streaming-fraud-detection/Thu, 18 Jun 2026 12:00:00 +0700https://tanhdev.com/series/core-banking-architecture/part-7-streaming-fraud-detection/Flink CEP fraud detection: 3 failed logins + high-value TX, RocksDB state, async ML inference 50-100ms SLA, 80% fewer false positives.https://tanhdev.com/series/core-banking-architecture/part-8-qa-sdet-handbook/Thu, 18 Jun 2026 12:10:00 +0700https://tanhdev.com/series/core-banking-architecture/part-8-qa-sdet-handbook/SDET handbook for Core Banking: double-spend, split-brain, clock skew, saga DLQ, DPoP replay, Flink TestHarness — 6 test categories for distributed fintech systems.