# Engineering review with István Antal

> A free 30 minutes for founders and small teams who want a senior engineer's read on what they're building — architecture, a tricky build, a cloud migration, code review, hiring or deploy practice. The second opinion you'd want from the senior person in the room when there's no one else to push back. Twenty years shipping production software, no slides, no pitch — a straight assessment of where you are and what I'd do next.

- Host: István Antal
- Duration: 30 min
- Location: Google Meet
- Host time zone: Europe/London
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.eu/istvan/engineering-review
- Event type id: 340013

## Check availability

```http
GET https://api.cal.eu/v2/slots?eventTypeId=340013&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

```http
POST https://api.cal.eu/v2/bookings
cal-api-version: 2026-02-25
Content-Type: application/json

{
  "eventTypeId": 340013,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `notes` (Additional notes), `guests` (Add guests)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.