# Engineering Strategy Call with JoinAffix

> We specialize in rescuing stalled AI prototypes, migrating legacy stacks to modern headless architectures (Next.js/React), and hardening infrastructure for scale. On this call, we will bypass the sales pitch and dive straight into your architecture, your bottlenecks, and exactly what it will take to fix them. Please come prepared with context on your current tech stack.

- Host: JoinAffix
- Duration: 30 min
- Location: Cal Video
- Host time zone: Asia/Dhaka
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/joinaffix/engineering-strategy-call
- Event type id: 6850114

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=6850114&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": 6850114,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "tech-stack-bottleneck": "…",
    "attendeePhoneNumber": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `tech-stack-bottleneck` (What does your current tech stack look like, and what is the primary engineering bottleneck you are trying to solve?)
- Optional fields: `attendeePhoneNumber` (Phone number), `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.