Case Studies Telecommunications
Leading South Asian telco
Org-wide event backbone
Kafka adopted as the org-wide event backbone—billing with transactional guarantees, bi-directional active-active MySQL↔Oracle, mobile clickstream. Write scale to ~150 MB/s CDC and GB/s on network and clickstream; streaming MVs for billing reversal / reconciliation reporting.
Apache Kafka · Kafka Connect · Debezium · Oracle CDC
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Customer
A leading South Asian telco putting Apache Kafka at the center of the organization—billing, operational data movement, and digital experience on one backbone.
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Challenge
Point-to-point integrations and database-centric corridors could not carry org-wide event traffic with consistent contracts: billing under load, cross-engine replication without dual-write chaos, and product clickstream at subscriber scale.
The backbone had to land as a shared platform—not a one-off bus for a single program—and hold very large write throughput without freezing delivery.
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Work
Drove Kafka adoption as the central event backbone, with Kafka Connect, Debezium, and Oracle CDC so producers and consumers could share contracts without freezing delivery.
Use cases on the backbone:
- Billing—usage, charging, refunds, and user notifications—with transactional guarantees at high throughput
- Bi-directional active-active pipelines between MySQL and Oracle
- Clickstream from the mobile app
Built streaming materialised-view aggregates for real-time reporting on billing reversals and reconciliation.
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Impact
- Org-wide Kafka backbone at write scale: ~150 MB/s CDC; GB/s on network and clickstream
- Billing path (usage, charging, refunds, notifications) with transactional guarantees under that load
- Streaming MV aggregates for real-time billing reversal / reconciliation reporting
- Active-active MySQL↔Oracle pipelines on Connect / Debezium / Oracle CDC
