The one-page version.

An AI-powered test generation tool that understands the whole repository. Diff-based testing catches what changed; it misses everything the change touches. TestBrain reads the codebase like a teammate would before writing a single test.

Designing multitenant systems with Cube.js as the semantic layer between raw data and every product surface that queries it. One source of truth for metrics, clean isolation per tenant — boundaries made explicit instead of implied.