I'm a software engineer building B2B platforms at Hecto Financial.
I enjoy contributing to open source — lately I've been working on node:ffi in Node.js — and I write about what I learn on my blog.
More about me: soulee.dev/about
안녕하세요, 이소울입니다. 헥토파이낸셜에서 B2B 플랫폼을 개발하고 있는 소프트웨어 엔지니어입니다.
오픈소스에 기여하는 것을 좋아하며, 최근에는 Node.js의 node:ffi 모듈에 기여하고 있습니다.
공부하고 경험한 내용은 블로그에 기록하고 있습니다.
더 자세한 소개는 soulee.dev/about에 있습니다.
| Project | Contributions |
|---|---|
| nodejs/node | node:ffi argument validation, lazy string allocation, docs (#65342, #65500, #65842, #66178, #66086 …) |
| keycloak/keycloak | Reset the page offset when the search term changes |
| fastapi/fastapi · Kludex/starlette | TrustedHostMiddleware / SessionMiddleware documentation |
| python-mysql-replication | MySQL binlog parser used for CDC at AWS, Kakao, etc. UTC timestamp fix, query optimization, tooling cleanup |
| shuding/nextra · orioncactus/pretendard | Docs and showcase fixes |
| hacktoberfestkorea | Maintaining the Hacktoberfest Korea site since 2020 |
Hecto Financial · Software Engineer · Dec 2025 – Present
- Designed and built microservices, bridging legacy systems for gradual migration
- Built a unified SSO with an API Gateway + BFF hybrid auth architecture
- Set up HA for databases and cache/session stores, plus CI/CD and monitoring
int4 · Founding Member & Software Engineer · Aug 2025 – Dec 2025
- Built an AI webtoon/image/video generation platform with a server-driven UI (DSL-based)
- Orchestrated a GPU server pool and streamed real-time progress over WebSocket (shared across tabs via SharedWorker)
- Improved tag search with Elasticsearch hybrid (vector + keyword) search
Republic of Korea Navy · Software Engineer · Dec 2023 – Aug 2025
- Designed an OAuth 2.0 / OIDC authentication system for an air-gapped network
- Migrated a legacy eGovFrame system to Spring Boot + Kotlin
- Introduced Git-based team collaboration and development standards
- Book · 『LLM 활용과 국방』 (co-author) · CommunicationBooks, 2026
- Paper · 국방 분야에서의 LLM 활용 문제점과 해결 전략 (first author) · 국방과보안, KCI, 2024
- Award · NIPA President's Award, for contributions to python-mysql-replication (2023)
- Award · Army Commendation, for LLM research advancing military science and technology (2024)
- AWS · Solutions Architect – Professional · Solutions Architect – Associate · Cloud Practitioner
- Korea · 정보처리기사 · 정보보안산업기사
- PayApp-FastAPI-Demo
- vkeypad-bypass
- KDOne
- k8s · Kubernetes study notes
