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Achievement: Pair Extraordinairex2Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

Achievements

Achievement: Pair Extraordinairex2Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

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Acacian/README.md

구동하 (Dongha Koo)

Backend engineer working on reliability, data consistency, and runtime security for LLM / agent platforms.

정합성이 걸린 자리에서 트레이드오프를 정하고 그 결정을 책임지는 일을 합니다. 터지면서 알려주는 실패보다, 조용히 틀리는 실패를 찾는 데 시간을 씁니다.

Blog · LinkedIn · Email

Work

Organization Position Period
Soosan INT Backend Engineer — eSafeAI, an enterprise LLM gateway 26.05 ~ now
Koosstech Backend & DevOps — R&D, closed-network ERP with KRRI 24.12 ~ 26.05
Memento AI Backend Developer (intern) 24.10 ~ 24.11

Building

Project What it does
Aegis Guardrails, a policy engine, and audit logging on every LLM call and tool execution. Auto-instruments 12 frameworks. PyPI
CandyPod Backend for a K-POP fan matching app, live on the App Store and Google Play.

Also involved in

  • litellm — billing xAI from the cost it reports instead of recomputing it (#36281 → merged as #39441)
  • Spring AI — DeepSeek tool-call content=null fallback (#3817) · RedisVectorStore BuilderCustomizer (#3809)

Writing

Java · Python · Spring Boot · FastAPI · PostgreSQL · Redis · Kafka · Docker

Seoul, South Korea · open to remote or relocation

Pinned Loading

  1. aegis aegis Public

    LLM guardrails & prompt injection detection for Python. Auto-instruments LangChain, CrewAI, OpenAI, LiteLLM + 8 more frameworks. PII masking, toxicity detection, policy CI/CD. One line, zero code c…

    Python 15 5

  2. fintech-BE fintech-BE Public

    Forked from InnerCircle-ICD3/fintech-BE

    재직자들과 진행한 핀테크 기반 사이드 프로젝트였으며, 총괄 리더 역할을 담당하였습니다.

    Java

  3. insty-backend-web insty-backend-web Public

    Forked from Insty-team/insty-backend-web

    라이브 서비스 Backend. 미디어 업로드 안정화, 대용량 요청 트러블슈팅, Python 기반 AI 추론 서버 연동 개발.

    Java

  4. kt-pattern kt-pattern Public

    Kotlin Pattern Matching DSL. when 기반 분기의 한계를 보완하기 위한 선언형 패턴 매칭 라이브러리.

    Kotlin

  5. Stock Stock Public

    Kafka 기반 비동기 메시징과 Redis 캐싱을 적용해 대규모 트래픽 처리를 실험한 주식 토론 게시판 백엔드 프로젝트

    Java