class Jaemin:
role = "Founder, CEO & CTO @ Quantus"
location = "Seoul, Korea"
stack = ["Claude Code", "Codex", "pure vibes"] # super vibe coder
dress_code = "three piece suit. yes, even while debugging."
def currently(self):
return "I say it, agents code it, I review it in a three piece suit"
def debug(self):
return "tie loosened, never removed"- ๐ฆ Building Quantus: say a trading rule in plain words, check it against price data back to 1964, then run it in your own brokerage account. 33 months live, USD 821M executed so far.
- ๐ค Working on Q, the AI agent on top of it (beta).
- ๐ Fun fact: I code in a suit. Real money runs on this code, so I dress for it.
- ๐งต Rules I stole from my tailor:
- measure twice, cut once โ backtest before the first order goes out
- no loose threads โ duplicate-order guards, audit logs, a kill switch
- fit over fashion โ boring tools that work
- ๐ Before this: sequence-data AI at Riiid, Nexon and Kakao Style, then quant work. PhD candidate at Sungkyunkwan University.
- sumbi: a self-improving harness for coding agents. Measures friction, keeps what works.
- pykbroker: one Python interface for Korean brokers (KIS, DB, Toss, Kiwoom, NH), fail-closed safety, read-only-by-default MCP server (early alpha)
- pycex: one typed, async-first Python API for 7 crypto exchanges (Binance, Bybit, OKX, Upbit and more), with an MCP server
- pydbsec ยท pykiwoom: Python wrappers for Korean broker APIs (DB Securities, Kiwoom)