Esmeralda C. Cabrera Ventura
The complete archive

Articles

Each piece takes one system I've worked on and walks the reasoning: the constraints, the trade-offs, what a decision cost, and what I'd approach differently next time.

July 2026 · 9 min read

Agents as services, not prompts: engineering a deterministic multi-agent SOC analyst

Five specialist agents, each deployed as its own addressable inference endpoint on IBM watsonx.ai, chained under a supervising orchestrator — and the decision to trade open-ended agent autonomy for a deterministic single-pass pipeline.

July 2026 · 9 min read

Proof of identity, not proof of humanity: a serverless gate for a public calendar

Engineering an identity-gated scheduling system on AWS Lambda, API Gateway, S3 and CloudFront — with a three-state policy engine whose admission rules are configuration and whose verdicts are proven across the entire input space.

July 2026 · 8 min read

Inside Fridge2Meal: a deterministic recipe engine built to reduce food waste

Why I engineered the core matching intelligence directly in PostgreSQL and Node.js, and designed the generative AI layer to sit beside it as an optional enhancement rather than a dependency.

Project detail

Agentic AI · Engineering dossier

Autonomous Cybersecurity Multi-Agent System

Six deployed AI services on IBM watsonx. Five specialist agents chained under a supervising orchestrator, grounded by trusted hybrid retrieval, executed as a deterministic single pass.

Serverless · Engineering dossier

Recruiter Verification Gateway

A serverless identity gate on AWS. Six services, one public route, a five-test tri-state policy engine proven across all 162 of its states, and signed fifteen-minute approval credentials.

Full-stack · Engineering dossier

Fridge2Meal

An ingredient-first meal platform. Five orchestrated services, 16 normalized tables, weighted compatibility ranking, Keycloak identity, and a containerized runtime that starts from one command.