Barcelona — Product Engineer

Alejandro
Mata

I build software that works — whether it involves AI or not.

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React.js — TypeScript — Full-Stack Development — Product Engineering — Python — Docker — FastAPI — PyTorch — OpenAI API — Gemini — Langfuse — Redis — Grafana — GraphQL — AWS — GCP — React.js — TypeScript — Full-Stack Development — Product Engineering — Python — Docker — FastAPI — PyTorch — OpenAI API — Gemini — Langfuse — Redis — Grafana — GraphQL — AWS — GCP —

Experience

haddockYC W22

AI Product Engineer

Nov 2025 — Present · Barcelona

Co-own the OCR document processing pipeline. Restaurant documents flow in via WhatsApp, email, or upload, get classified and parsed, and matched to suppliers automatically. Built the entire WhatsApp ingestion channel from scratch. ~155 PRs in 5 months.

Factor Energia

AI Engineer, Voice

Jan 2025 — Nov 2025 · Barcelona

Built a sub-2s latency voice agent framework automating 60%+ of customer support calls. Owned the full stack: backend APIs, monitoring, semantic clustering for intention analysis. All stakeholders loved the Grafana dashboards.

SIF Investment Fund

Software Engineer, Data Pipelines

Jan 2024 — Jul 2024 · Sacramento, CA

Rebuilt the fund's data pipeline, cutting processing from hours to seconds and automatically filtering 90% of unreliable sources. Deployed on AWS with zero downtime. The portfolio outperformed the S&P 500 that year.

Vibia

IoT Intern

Apr 2023 — Aug 2023 · Barcelona

Pioneered smart product testing with a Jira-integrated ecosystem and a GraphQL API — reduced reporting time from hours to minutes. Explained it all to the C-suite.
Universidad de Valladolid • Computer Systems & Telecom Universitat de Barcelona • Business Administration California State University, Sacramento • Data Science • 4.0 GPA, Dean's Honor List Universidad de Valladolid • Computer Systems & Telecom Universitat de Barcelona • Business Administration California State University, Sacramento • Data Science • 4.0 GPA, Dean's Honor List

Say hello

alemalvarez@icloud.com LinkedIn GitHub