Can I vibe code CleverTap?

Build a lightweight customer engagement backend and API service using Node.js, Express, PostgreSQL, Redis, and BullMQ.

1. DATA MODEL:
- Create schemas for 'users' (id, email, phone, attributes JSONB, created_at).
- Create schemas for 'events' (id, user_id, event_name, properties JSONB, timestamp).
- Create schemas for 'campaigns' (id, name, channel ['email', 'sms'], trigger_event, delay_seconds, template_id).
- Create schemas for 'push_tokens' (user_id, platform ['apns', 'fcm'], token, active_boolean).

2. CORE FUNCTIONALITY:
- Event Tracking API: POST /v1/track accepting user_id, event_name, and properties. Insert event into PostgreSQL and push to a Redis event channel.
- Dynamic Segmentation Engine: Write a service that queries PostgreSQL using JSONB operations to fetch users who performed 'event_A' but not 'event_B' within a specific time window.
- Journey Workflow Processor: Use BullMQ to enqueue delayed jobs when an event matches a campaign trigger_event. When processed, call external delivery APIs (Resend for email, Twilio for SMS).
- Handle basic opt-out tracking: exclude users marked as unsubscribed prior to payload execution.

3. FAILURE MODES & EDGE CASES:
- Idempotency: Deduplicate incoming track calls using an event payload hash in Redis with a 60-second TTL.
- Retry logic: Implement exponential backoff for third-party API failures (Resend/Twilio) up to 3 attempts.
- Token Invalidations: Mark push_tokens inactive if the provider returns a 410 or invalid token error response.

4. OUT OF SCOPE:
- Mobile SDK development, live visual drag-and-drop workflow canvas, machine learning propensity scoring, and real-time mobile push socket management.

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