https://www.youngju.dev/blog 천천히 올바르게. AI Researcher & DevOps Engineer Youngju's tech blog. GPU/CUDA, LLM, MLOps, Kubernetes AI workloads, distributed training, and data engineering. ko fjvbn2003@gmail.com (Youngju Kim) fjvbn2003@gmail.com (Youngju Kim) Sat, 13 Jun 2026 00:00:00 GMT https://www.youngju.dev/blog/finance/2026-06-13-banking-ledger-design-double-entry.en https://www.youngju.dev/blog/finance/2026-06-13-banking-ledger-design-double-entry.en How to design the ledger at the heart of a banking system. We cover double-entry principles, the journal and posting data model, balance computation strategies, event sourcing, hot-account concurrency control, idempotency design, and consistency verification that does not tolerate a single cent of error. Sat, 13 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) financeledgerdouble-entryevent-sourcingcore-bankingdatabasearchitecture https://www.youngju.dev/blog/finance/2026-06-13-banking-ledger-design-double-entry.ja https://www.youngju.dev/blog/finance/2026-06-13-banking-ledger-design-double-entry.ja 銀行システムの心臓部である元帳の設計を扱います。複式簿記の原理、仕訳とポスティングのデータモデル、残高計算戦略、イベントソーシング、ホットアカウントの同時実行制御、冪等性設計、そして1円も狂わない整合性検証まで、実務の観点から整理します。 Sat, 13 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) financeledgerdouble-entryevent-sourcingcore-bankingdatabasearchitecture https://www.youngju.dev/blog/finance/2026-06-13-banking-ledger-design-double-entry https://www.youngju.dev/blog/finance/2026-06-13-banking-ledger-design-double-entry 은행 시스템의 심장인 원장을 어떻게 설계하는지 다룹니다. 복식부기 원리, 저널과 포스팅 데이터 모델, 잔액 계산 전략, 이벤트 소싱, 핫 어카운트 동시성 제어, 멱등성 설계, 그리고 1원도 틀리지 않는 정합성 검증까지 실무 관점에서 정리합니다. Sat, 13 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) financeledgerdouble-entryevent-sourcingcore-bankingdatabasearchitecture https://www.youngju.dev/blog/finance/2026-06-13-core-banking-deposit-system-architecture.en https://www.youngju.dev/blog/finance/2026-06-13-core-banking-deposit-system-architecture.en A deep dive into the deposit system at the heart of core banking. We cover account ledger design, deposit and withdrawal transaction processing, concurrency control, and how end-of-day closing coexists with 24x7 operation, all from a practitioner perspective. Sat, 13 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) core-bankingdepositledgerarchitecturebankingfinance https://www.youngju.dev/blog/finance/2026-06-13-core-banking-deposit-system-architecture.ja https://www.youngju.dev/blog/finance/2026-06-13-core-banking-deposit-system-architecture.ja 勘定系の中核である預金(受信)システムを解剖します。口座元帳の設計、入出金トランザクション処理、同時実行制御、そして日次バッチ締めと24時間365日無停止運用の共存まで、コアバンキング実務の視点で整理しました。 Sat, 13 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) core-bankingdepositledgerarchitecturebankingfinance https://www.youngju.dev/blog/finance/2026-06-13-core-banking-deposit-system-architecture https://www.youngju.dev/blog/finance/2026-06-13-core-banking-deposit-system-architecture 은행 계정계의 핵심인 수신(예금) 시스템을 해부합니다. 계좌 원장 설계, 입출금 거래 처리, 동시성 제어, 일마감과 24x7 무중단의 공존까지 코어뱅킹 실무 관점에서 정리했습니다. Sat, 13 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) core-bankingdepositledgerarchitecturebankingfinance