Streaming Invoice Events with Apache Kafka

Apache Kafka is a distributed event streaming platform built for high-throughput, fault-tolerant, real-time data pipelines. In an invoicing context, Kafka acts as the event bus: TallyArc publishes invoice lifecycle events (created, sent, viewed, paid, overdue, disputed) to Kafka topics, and any number of downstream systems consume and act on those events independently — without tight coupling between systems.

The event-driven invoicing architecture

A Kafka-based invoice event architecture looks like this:

1. TallyArc publishes events to Kafka topics: invoices.created, invoices.paid, invoices.overdue
2. Downstream consumers process these events independently:
   • ERP system updates AR balance on invoices.paid
   • Data warehouse ingests all events for analytics
   • CRM updates customer account status on invoices.overdue
   • Slack/Teams notification service alerts the finance team
   • ML pipeline updates payment risk scores

Each consumer operates independently, at its own pace, without creating dependencies between systems.

Kafka topic schema (invoice event)

{
  "event_type": "invoice.paid",
  "event_id": "evt_abc123",
  "timestamp": "2025-01-15T14:32:00Z",
  "invoice_id": "inv_xyz789",
  "client_id": "cli_456",
  "amount": 4750.00,
  "currency": "GBP",
  "payment_method": "stripe_card",
  "invoice_total": 4750.00,
  "days_to_pay": 12
}

Connecting TallyArc to Kafka

1. In TallyArc, go to Data → Kafka → Connect
2. Enter your Kafka bootstrap servers (e.g. broker1:9092,broker2:9092)
3. Configure SASL/SSL credentials if your cluster requires authentication
4. Set the target topic prefix (e.g. tallyarc → events publish to tallyarc.invoices)
5. Save — events begin streaming immediately

Confluent Cloud

For teams that don't want to manage Kafka infrastructure, Confluent Cloud is the easiest option — fully managed Kafka with a generous free tier. TallyArc connects to Confluent Cloud using the same settings; use the Confluent bootstrap server URL and API key/secret credentials.