A real-time CDR pipeline at carrier scale
What we'd design for: call data spread across batch legacy systems, landing hours late, with no way to replay a bad window. We'd build a streaming pipeline that goes from SIP event to dashboard in under a second, handles 10M+ records a day without loss, and supports replay and backfill on demand — with the latency and throughput targets agreed and load-tested before cutover, not asserted afterwards.

