effective-dating

A .NET 10 WPF foundation built around effective-period (temporal) data: nothing valid is ever deleted, every record carries the dates it is valid for. Includes a working IAM module on MySQL.

Legacy HR and payroll data migrated into a Workday-shaped target: staged, cleansed, validated, loaded and reconciled to the cent, with every rejection and change traced to a numbered rule. Pure Python + SQLite, zero dependencies, with an interactive replay of the run.

Index versioned rate cards and resolve exactly one applicable rate per SKU and timestamp, or refuse

Bitemporal entity change history for Go — valid time and transaction time, ORM-agnostic over database/sql. Know what your data was, and what you believed it was.

GA(법인보험대리점) 설계사 수수료 계산·지급·환수·정산 엔진 — 규제 변동성을 코드가 아닌 데이터로 흡수한 Java 21/Oracle 시스템 (학습·포트폴리오)