Production software,
end to end.

Nine years building and shipping on TypeScript, Next.js and Python — with Azure and AI as part of the toolkit, not a separate department. I take features from product decision to production across the full stack — no handoffs between specialists along the way.

hello@enrictrillo.com Read the writing →

Expertise

Product Engineering
System Design
Cloud Infrastructure
Applied AI

Now

Building depth in Azure, with AWS returning to the toolkit down the line.

Selected work

Watchman
Real-time system health monitor.
Shipped2026
GitHub — Watchman Case study — Watchman
supasteeltokens
npm package for token encryption, rebuilt from scratch in v2.0.0 around proper AES-256-GCM.
TypeScript · Node · npm
Shipped2026
npm — supasteeltokens

Toolkit

Interface590nm: TypeScriptReactNext.jsTailwind
Systems520nm: NodePythonPostgreSQLREST APIs
Compute470nm: AzureVercelDockerCI/CD
Intelligence405nm: LLM APIsAgents & tool useRAGEvals

Latest writing

All posts →

Intelligence6 Aug 20263 min read

What a retrieval eval harness actually needs

Systems28 Jul 20263 min readWatchman

Watchman: cutting the p99 with a second index

Intelligence11 Jun 20265 min read

Structured output is a schema problem, not a prompt problem

About

I'm Enric Trillo, a fullstack product engineer based in London, UK, working through Metasyde.

I build and ship production software end to end: product thinking through frontend, backend, cloud and AI. In practice that's TypeScript and Next.js on the front, Python and Node behind it, Azure underneath, and AI work layered through the middle — part of the toolkit rather than a separate specialism.

Production software,end to end.

Now