# Discovery Call: Backend & AI Infrastructure with Hritul Srivastava

> A short video call to explore how distributed systems and GenAI pipelines can drive measurable impact for your product. During this session, we'll cover Your product goals, current infrastructure, and scaling bottlenecks Opportunities to integrate GenAI and automation for better efficiency Architecture and pipeline strategies to ship your roadmap faster Next steps for collaboration or a proof of concept Ideal if you're looking to Validate a technical approach with expert feedback Explore where GenAI or automation can replace manual work Collaborate with a Backend + GenAI engineer who understands distributed systems and production AI

- Host: Hritul Srivastava
- Duration: 20 min
- Location: Google Meet
- Host time zone: Asia/Calcutta
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/hritul/discovery-call
- Event type id: 4815966

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4815966&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": 4815966,
  "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.