Essays and notes on AI, software engineering, developer tools, systems, and the shape of modern product building.
Antonio B De Castro

End-to-end type safety between your API and client—without code generation or schemas
Antonio B De Castro

React Server Components are the future, but the migration path is a minefield
Antonio B De Castro

Vendor-neutral instrumentation that works with every backend—stop locking yourself into Datadog
Antonio B De Castro

WASM’s real impact won’t be in the browser—it’ll be everywhere else
Antonio B De Castro

End-to-end testing should be fast, reliable, and multi-browser—Playwright delivers all three
Antonio B De Castro

The story of how developer experience finally beat configuration
Antonio B De Castro

Haskell, Clojure, and Prolog will change how you think in TypeScript and Python
Antonio B De Castro

If your tsconfig doesn’t have strict mode enabled, you’re writing JavaScript with extra steps
Antonio B De Castro

SQLite at the edge is the architectural pattern nobody saw coming
Antonio B De Castro

Edge deployment with Docker containers, built-in Postgres, and a CLI that doesn’t make me cry