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GHGHGHKO/README.md

Hi there, I'm 고형규 (Hyung-gyu Ko) 🍺

Backend Engineer at GS Retail, building scalable logistics and CRM systems serving millions of customers.


GS Retail에서 수백만 고객을 대상으로 한 물류·CRM 시스템을 설계하고 운영하는 백엔드 엔지니어입니다.


🛠 Tech Stack

Languages Java Kotlin Rust Python TypeScript

Backend Spring Boot Spring Batch Spring Security

Database & Cache PostgreSQL Oracle Redis

Infrastructure AWS Kubernetes Docker Airflow Datadog


🚀 Open Source Projects / 오픈소스 프로젝트

Project Description Stars Tech
dalgona 🦀 Cross-platform GIF meme finder (Windows & macOS) ⭐ 117
Tauri, Next.js, Rust
klassic-quote-api 🎬 Korean classic movie quotes REST API ⭐ 21
Rust, Axum, Docker
klassic-quote 🎬 Korean movie quotes frontend ⭐ 9 TypeScript
upptime 🟢 Self-hosted uptime monitoring - GitHub Actions

💼 What I Do / 주요 업무

EN

  • Designed a delivery backend monorepo serving 6 systems and 18,000+ field devices, secured with JWE + AWS KMS
  • Migrated 5 logistics services from IDC to AWS, converting Oracle SQL to ANSI SQL with zero downtime
  • Modernized batch architecture from @Scheduled to Airflow + KubernetesPodOperator for isolated, observable execution
  • Built Datadog logging standards — CUD audit trails, PII segregation via Logback Marker, distributed request tracing
  • Stabilizing a 20-million-user CRM platform — recovering dead batches, fixing data sync bugs, building privacy-compliant APIs

KR

  • 6개 시스템·전국 18,000대 현장 기기를 지원하는 택배 백엔드 모노레포 설계 (JWE + AWS KMS 보안)
  • 5개 물류 서비스 IDC → AWS 이관, Oracle SQL → ANSI SQL 무중단 전환
  • @Scheduled 배치를 Airflow + KubernetesPodOperator 구조로 개선 — 앱 재배포와 배치 실행 분리
  • Datadog 로그 수집 체계 구축 — CUD 감사 로그, Logback Marker 기반 개인정보 분리, 분산 트레이싱
  • 2,000만 회원 CRM 플랫폼 안정화 — 장기 중단 배치 복구, 개인정보 동기화 버그 수정, 프라이버시 준수 API 개발

📫 Links

Portfolio
Instagram

Pinned Loading

  1. dalgona dalgona Public

    Forked from agmmnn/tauri-ui

    🦀Tauri desktop app with shadcn/ui, Next.js, GIF meme finder app for Windows and macOS. (dalgona)

    TypeScript 116 1

  2. klassic-quote klassic-quote Public

    A REST API for Korean classic movies quotes

    TypeScript 9

  3. klassic-quote-api klassic-quote-api Public

    Korean movie quotes API

    Rust 21 2

  4. goose-auth-api-server goose-auth-api-server Public

    https://ghghghko.github.io/slate/#introduction

    Java

  5. pepega-blog-kotlin pepega-blog-kotlin Public

    https://pepega.tistory.com/category/Kotlin

    Kotlin 3

  6. upptime upptime Public

    Are you dead or alive?

    Markdown