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.

• MSA를 시작하다
• Node.js FFI - (1) 시작하기
• AWS SAP-C02 치트시트
• AWS SAP-C02 합격 후기
• 개발자가 놓치기 쉬운 보안 체크리스트

More posts on soulee.dev

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

Full experience on LinkedIn →

• 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