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

Fine-grained reactivity without a virtual DOM—what if React’s mental model was wrong all along?
Antonio B De Castro

You don’t need Haskell to benefit from immutability, pure functions, and composition
Antonio B De Castro

CI/CD shouldn’t require a dedicated team to maintain—and now it doesn’t
Antonio B De Castro

V8 isolates, KV storage, R2 object storage, and D1 databases—it’s a full stack at the edge
Antonio B De Castro

Pub/sub, streams, sorted sets, and Lua scripting make Redis a Swiss Army knife for distributed systems
Antonio B De Castro

Vite’s test runner is what Jest should have been: fast, simple, ESM-native
Antonio B De Castro

N+1 queries, schema sprawl, and authorization nightmares—the operational side of GraphQL nobody warned you about
Antonio B De Castro

Cloudflare Workers and Deno Deploy are quietly rewriting the rules of deployment latency
Antonio B De Castro

The JavaScript framework wars aren’t over—they’re evolving toward simplicity
Antonio B De Castro

Secure by default, TypeScript native, URL imports—Deno’s ideas are winning even if Deno isn’t