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Steven D.

Steven D.

AI Consultant · Mid-Level

Spain · Rate on request

Professional Overview

I'm an AI Engineer specializing in LLM application development with the Claude API. Over the past months I've independently designed and shipped four production GenAI applications, covering AI document reading and structured data extraction, function-calling agents, and full-stack apps across Node.js, Python/FastAPI, and React/Next.js. I focus on

Experience

Company
AI-Arquitecto (independent)
Jan 2023 – Present
Role title
AI Engineer / Full-Stack Developer (GenAI)

AI Expertise

Automation & AI Workflows

Skills

Python OpenAI API Prompt Engineering

Description of Responsibilities

  • Designed and shipped 4 production GenAI apps using the Claude API
  • Built AI document reading + structured extraction with function-calling
  • Full-stack across Node.js, Python/FastAPI, React/Next.js, Angular
  • Integrated and deployed LLM features to production on Vercel
  • End-to-end API integration: auth, structured I/O, errors, retries

Key Achievements / KPIs

  • Shipped 4 complete GenAI apps solo in ~6 months, idea to deployment
  • Built zero-dependency Node.js tax tool with AI invoice reading
  • Deployed live Spanish tax calculator on Vercel with AI explainer

Areas of Expertise

AI & Machine Learning Engineers

Design, train, and ship production ML models — from data pipelines to model inference at scale. Covers supervised learning, neural networks, LLM integration, and model optimisation.

Automation & AI Workflows

Build intelligent automation pipelines, integrate AI APIs into existing tools, and replace manual workflows with agentic AI systems.

NLP & Prompt Engineering

Build natural language processing systems, fine-tune large language models, and craft reliable production prompts for AI-powered products.

Open to

Full-time Freelance Contract Contract-to-hire Part-time

Experience Level

Mid-Level

Current location

Spain

Time Zone

Madrid UTC+1

Primary Work Language

English

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