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Achievement: Pull Sharkx3Achievement: YOLOAchievement: Pair Extraordinairex3Achievement: Quickdraw

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yongjip/README.md

Yongjip Kim

I build practical data systems, developer tools, and games.

Head of Data Platform at Techtaka; previously Coupang. I work on data platforms, analytics workflows, and AI-assisted tools for operational teams.

I build games and software under Oddfini. Projects include TERATORN, a strategy board game set on Mars, and Codex Control, a Stream Deck plugin for Codex task settings.

Open-source projects

Project What it does
mergetrain A local merge queue for parallel coding agents, with combined checks, approved atomic pushes, and interrupted-push recovery.
song2mv An alpha CLI that aligns lyrics to audio and beat grids, with LRC/SRT and word-level timing output.
Whir A macOS menu bar app that estimates the API-equivalent value of Claude Code and Codex usage from local logs.
lfpolicy Reviews AWS Lake Formation permissions, explains access, detects drift, and plans policy changes.

Open-source contributions

  • PhotoCraft — Improved Liquify rendering at tile boundaries.
  • Streamlit — Contributed bug reproductions and root-cause analysis for AppTest and Components v2.

Selected data systems work

  • Text-to-SQL — Structured metadata, Athena execution, and validation loops for ad-hoc analytics. Estimated turnaround: roughly 4–10 hours to under 1 hour.
  • Warehouse optimization and simulation — Graph modeling and simulation for testing inventory placement and picker travel distance.

Links

Portfolio: EN · 한국어 · Oddfini products · LinkedIn

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  1. mergetrain mergetrain Public

    Local merge queue for parallel LLM agents in Git worktrees. Test combined code changes, require approval for Git pushes, and recover interrupted pushes.

    Python 7 2

  2. whir whir Public

    macOS menu bar app for estimated Claude Code and Codex usage value, with local history and system monitoring.

    Swift

  3. lfpolicy lfpolicy Public

    Review AWS Lake Formation permissions, explain effective access, detect drift, and plan policy changes.

    Python