# Product & Architecture Discussion with Nadeem Ashraf

> A collaborative session focused on translating product requirements into practical engineering solutions. What we can explore: Product architecture and technical direction System design, scalability, and integrations Feature feasibility and implementation planning Engineering trade-offs and technology choices Bridging product requirements with technical execution Ideal for founders, product managers, engineering leaders, and teams working through complex product or technical decisions. Sharing relevant product context or documentation beforehand is highly encouraged.

- Host: Nadeem Ashraf
- Duration: 60 min
- Location: Cal Video
- Host time zone: Asia/Calcutta
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/nadeemashraf/product-architecture-discussion
- Event type id: 7823118

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7823118&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.com/v2/bookings
cal-api-version: 2026-02-25
Content-Type: application/json

{
  "eventTypeId": 7823118,
  "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.