# Hyogeun Oh – Cal.com booking page

> Book a meeting with Hyogeun Oh on Cal.com.

Booking page: https://cal.com/zerohertz

## Event types

- [☕️ Coffee Chat ☕️](https://cal.com/zerohertz/coffee-chat): 30, 60 min, confirmed instantly, event type id 2521730. Hi, I'm Hyogeun Oh! 👋 ML Engineer at Toss Securities. I'm into MLOps, LLM inference optimization, and anything GPU-related — vLLM, distributed serving, Kubernetes, that kind of stack. Always happy to chat if you're working on similar problems or just want to exchange ideas. 전문연구요원 관련 고민 있으신 분들도 편하게 연락 주세요! 🙌 Details: https://cal.com/zerohertz/coffee-chat.md

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=<event type id>&start=YYYY-MM-DD&end=YYYY-MM-DD&timeZone=<IANA time zone>
cal-api-version: 2024-09-04
```

The response is `{"data":{"YYYY-MM-DD":[{"start":"<ISO 8601 with offset>"}]}}`; no API key is needed.

## Book

Each event type's `.md` document lists its required booking fields and the `POST https://api.cal.com/v2/bookings` request (`cal-api-version: 2026-02-25`).

## More

- API docs: https://cal.com/docs/api-reference/v2/introduction