Hey there!
I’m a CS Student at KNU based in South Korea.
I started out building game servers and moved into system and balance design.
I write system specs that developers can build from directly, set growth and economy numbers in spreadsheets and simulations, and check them in playable prototypes.
- System Design: rules, flows, exceptions and data tables, written down to the level of server checks
- Balance Design: growth curves, economy and reward pacing, set from target play time and checked by simulation
- Prototyping: playable builds that run on the same numbers as the design docs, so I can test them myself
- RaidMyDungeon · async PvP dungeon builder · sole designer on a team of 5
- Netrunner's Playlist · cyberpunk idle game · design + C++ server on a team of 2 (server)
- MapleStory Starforce · reverse-engineered design doc of the enhancement system (in progress)
📂 Portfolio: hellobot99.github.io/game-design-portfolio
- Design Docs: Notion, Markdown, Mermaid (flowcharts)
- Balance: Excel (formula-linked sheets, charts), Python (progression simulation, Monte Carlo)
- Prototyping: Unity, HTML/JS web prototypes
- AI: Claude Code for prototype code, simulators and data scripts. I make the design calls and check the results.
- Engineering Background: C++, C, Java · IOCP, Boost.asio · MySQL, Oracle, Redis
- Dog person
- I survive on Coke
- Favorite Game: LOL, Factorio
- On exchange in Tokyo (2026.04 ~ 2027.01)