Under the Hood of Audience Building

Segmentation is the heart of any CDP. But the difference between a toy segmentation builder and a production-grade engine lies in how it handles complex logic, scales to millions of profiles, and integrates with the data warehouse. This article tears apart the inner workings of a real segmentation engine.

Key Topics Covered

  • Recursive filter DSLs — how nested AND/OR logic, property filters, and time windows compose into powerful segment definitions.
  • SQL compilation — translating segment definitions into optimized warehouse queries.
  • Warehouse-native execution and why pushing computation to the data plane matters.
  • Real-time evaluation patterns and how segments stay fresh as data flows in.
  • Performance considerations at scale — indexing, caching, and incremental evaluation.