FastAPI · Rust · Scoring · Security
CareerFit RCR — Job Discovery & Document Generation
A system for collecting official job postings, matching requirements and drafting documents from verified career facts.
AI and data platform engineering
Python, FastAPI, SQL and LLM/RAG systems. Project details cover implementation and operating experience.
Projects
Python · MariaDB · Docker · ETL
Public Customs AI Operations Platform
Loaded and processed roughly 300M Korea Customs Service and MFDS records from 2022-2026, then built admin features, automated DB refresh, operations handover, and load-test workflows. The architecture is refined around development, operations, and user workflows.
Whisper · ffmpeg · DTW · LLM
Video Auto-Editing Program
Speech recognition, summarization and video editing, with an authenticated workspace to run analysis and review clips.
FastAPI · GraphRAG · TimescaleDB · Qdrant
Precise — Market GraphRAG Workspace
A private research system for market data, evidence retrieval, ticker analysis and backtesting.
OCR · PDF · Regex · FastAPI
Import Declaration Auto-Completion POC
Integrates and analyzes highly unstructured source documents to auto-fill public customs import declarations.
LightGBM · Unknown · SHAP · FAISS
Packet Chatbot — Explainable Network Anomaly Detection
Runs PCAP → features → classification → evidence, similar cases, summary → report in one flow. Detection trust is improved with probability calibration, Unknown routing, SHAP, and FAISS.
Paramiko · Keyring · Windows · Security
Babayetu — SSH Automation CLI
babayetu <alias> one-command access.
RSA auto-login, native backup/restore, and Windows Terminal integration
improve both security and recovery.
Use the systems
- Precise
- Market research · Cloudflare Access sign-in required
- JESUS_RENS
- Video analysis and review · JESUS_RENS account required
- AI Avatar
- Ask about curated public experience and decisions
Profile
- NameHyungjun Cho
- RoleAI/ML Platform Engineer
- Emailjoonnight@gmail.com
- TargetFDE · AI Backend · Data Platform
Education & Skills
- Yonsei University Mirae Campus, Environmental Engineering
- PythonFastAPISQLDockerETLLLM/RAGGraphRAGPostgreSQLMariaDBTesting
English: professional working communication
Experience
- KCNET — AI Platform Engineer (2025.07 ~ Present) — Data pipelines, admin backend, DB standardization, and operations infrastructure for a public customs data platform.
- DataStocks — Founder & ML Engineer (2024.05 ~ 2025.04) — Designed and built a real-time stock analysis program based on cosine similarity.
- Whisco & Bizpark — Web Developer (2021.12 ~ 2024.05).
- LGU+ Next-Generation Project — DB Developer (2022.11 ~ 2023.10) — DA#, ETL/DataStage, Oracle DDL, and BI interfaces.
- National Election Commission — Web Developer (2024.01 ~ 2024.04) — Operations and maintenance for the 2024 general-election campaign mailing system.