Backend / DevOps engineer. CS senior at Chungnam National University. I like automating messy processes and making Korean enterprise software workflows sane.
Backend · DevOps · Automation · RPA
Undergraduate Researcher, CNU Data Network Lab (Advisor: Prof. Youngseok Lee)
Designing and building an MCP (Model Context Protocol) server for HWP document control. The server wraps the Windows COM API and pyhwpx behind MCP, so LLMs can manipulate HWP documents through natural language. A self-correction loop pushes table-control task success rates significantly above baseline.
KSC 2025 — Korea Software Congress, poster session (Yeosu, Dec 2025) "MCP Design and Implementation for HWP Document Table Control" — Minwoo Choi, Youngseok Lee. CNU.
2023.09 – 2025.12 (27 months)
Backend service work and full infrastructure transition at Mockingbird, a Korean K–12 edtech startup.
A viral Twitter post drove a traffic spike that took down the exam-generation server. I scaled horizontally to stop the bleeding, then redesigned the hotspot with a singleton-backed object reuse pattern. End result: ~50× improvement in request throughput, stable afterwards.
Led the full migration when AWS credits ran out. Started on Windows Server + WSL (Korean-service requirements), hit docker-compose's recovery limits, so moved to a k3s cluster with Cloudflare Tunnel + Ingress for external exposure. Later swapped the Windows base to Ubuntu to remove OS-level bottlenecks.
Payments and cart on Spring + Toss Payments API. Coupon system — DB schema through admin CRUD. 080 opt-out wired into the outbound SMS pipeline for regulatory compliance.
- 개념원리 — HTML → HWPX converter · Python + Django + LATEX2HANTEX (in-house) exposed as an API.
- Hidden KICE scoring platform · Owned backend and DB design, deployed on AWS with DNS.
- 시대인재 AI subtitles · MP4 → Whisper API → SRT pipeline. Solved Whisper's 25 MB limit via audio splitting, parallel dispatch, and timestamp stitching.
- Mockingbird B2B SaaS item bank · Windows + Django; API and DB design.
2021.10 – 2023.07
RPA team. Automated administrative workflows with Python and UiPath — officer allowance calculation & disbursement, commendation-leave tracking. UiPath UIARD certified (2022.12).
- CNU Data Network Lab — undergraduate research (2021.05 – 2021.10). DMOJ stats/charts with Django + Chart.js, a Discord tutor-matching bot, Ubuntu ops.
- JEIL Academy — RPA developer (2020.06 – 2021.03). PDF → HWP image conversion with OpenCV, video-timeline generator, QR macro for textbooks, automatic math-problem generator.
- Authored 5 problems for the 4th & 5th "Thinking Programming Contest" on Baekjoon Online Judge.
- Competed at UCPC, SCPC, and ICPC Korea 2020.
- Released a Python + Selenium tool for managing cyber lectures during the 2020 COVID remote-learning surge — 500+ downloads on Everytime.
| Area | |
|---|---|
| Languages | Java · Python · C++ |
| Backend | Spring · Django |
| Data | MySQL · PostgreSQL |
| DevOps / Infra | AWS · Docker · Kubernetes (k3s) · Cloudflare Tunnel · Ubuntu · WSL |
| Other | RESTful API · Selenium · OpenCV |
UIARD — UiPath Advanced RPA Developer Certification UiPath · 2022.12.01 · verify
Email — chaeminu0711@gmail.com