Here’s a simple app event notification workflow you can use as a template.

1) Event occurs

An action happens in your app, such as:

• user signs up
• order placed
• payment failed
• file uploaded
• password changed

2) App emits event

The backend or app service publishes an event like:

• user.created
• order.placed
• payment.failed

This can go to:

• a message queue
• event bus
• webhook processor
• internal event system

3) Notification rules evaluate

A notification service checks:

• who should be notified
• which channel to use
• whether notification is enabled
• whether the event is urgent
• user preferences and timezone

Example rules:

• Send email for order confirmations
• Send push notification for payment failures
• Send in-app alert for security events

4) Template and content generation

The system builds the message using event data:

• recipient name
• event details
• timestamp
• deep link or CTA button

Example:

“Your payment failed for Order #1234. Please update your card.”

5) Channel delivery

The notification is sent through one or more channels:

• in-app notification
• email
• SMS
• push notification
• Slack/Teams for internal alerts

6) Delivery tracking

Track outcomes:

• sent
• delivered
• read/opened
• clicked
• failed/retried

7) User action or follow-up

The user may:

• open the app
• click a link
• complete a task
• dismiss the notification

The system may trigger a follow-up event based on that action.

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Example workflow

Event: payment.failed
Steps:

1. Payment service emits event
2. Notification service receives it
3. User preference says push + email
4. Message generated from template
5. Push sent immediately
6. Email sent if push fails or as backup
7. Read/click tracked
8. Retry payment link shown

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Recommended architecture

• Event producer: app service
• Event broker: Kafka / RabbitMQ / SNS / PubSub
• Notification service: routing + templating + delivery
• Channel providers: email/SMS/push APIs
• Database: notification logs and user preferences
• Analytics: delivery and engagement tracking

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If you want, I can also provide:

1. a flowchart
2. a database schema
3. a microservice architecture
4. a sample JSON event format