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AI Engineer for production delivery

Production-ready AI systems for teams moving beyond prototypes

I help teams turn AI pilots into reliable systems using RAG, APIs, and agent-based workflows.

4+ years across data science, data engineering, and AI platforms, with hands-on delivery in agentic AI, retrieval, and production APIs.

70% less manual processing 40% better retrieval accuracy 500+ daily API requests served

Portrait of Andrés Espinosa Sanfiel, AI Engineer

Problems I help solve

Common gaps when an AI demo needs to become a dependable system.

  • The demo works, but production still feels fragile


    The model looks good in a notebook, but the workflow breaks once routing, retries, human review, and system boundaries are added.

  • Retrieval quality is inconsistent


    Vector search misses exact business terms, keyword search misses intent, and answers drift too much to trust.

  • No one is shaping the production path


    Product, data, and engineering all see the opportunity, but nobody is defining the architecture that turns it into a reliable service.

What I do

I focus on making AI systems reliable, measurable, and easier to operate.

  • Agentic AI systems


    Deterministic workflows with LangChain, LangGraph, PydanticAI, Agno, and MCP so multi-step behavior stays observable and testable.

  • RAG and hybrid search


    Retrieval systems that combine vector and keyword search, improve domain accuracy, and keep the LLM layer loosely coupled.

  • Production AI APIs


    FastAPI services, async processing, streaming interfaces, and deployment patterns that support real usage instead of demo traffic.

Three recent projects with measurable production outcomes.

Need help turning a useful AI prototype into a production system?

If the business case is already clear but the delivery path still feels fragile, I can help define the architecture, the delivery risks, and the next implementation steps.

Watch the technical talk

Datamecum Webinar 2025

AI-Powered Email Automation: From Chaos to Action

A public walkthrough of a production email automation system that reduced daily triage from 100+ messages to 10-15 actionable items.

What an engagement usually looks like

Certifications and speaking

Frequently asked questions

What kind of projects are you best suited for?

Projects where AI already looks useful, but the team still needs a production-ready architecture. That includes agentic workflows, hybrid RAG, and AI APIs serving real users.

Can you work with an internal engineering team?

Yes. I can work independently or as a technical partner embedded with an internal product or engineering team.

How do you approach delivery?

I start with the business goal and success metrics, then design around reliability, observability, and maintainability.

Where are you available?

I am based in Spain and available remotely across Europe. I work in English and Spanish.

How does pricing work?

Most work is project-based with clear milestones. Ongoing support can be structured as a retainer after the initial call.

Ready to evaluate your AI backlog?

Bring the current problem, the stack you already have, and the delivery constraints that matter. I will help map what should be automated, what should stay deterministic, and what it will take to ship it safely.