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Mechatronic Engineer and Technologist in Design and Integration of Mechatronic Automatism Systems, with over 10 years of experience in the engineering/technical area. Skilled in electrical and electromechanical circuit analysis, PLC/HMI programming (Allen Bradley, Schneider Electric, Siemens, among others), interpretation and implementation of electrical diagrams, maintenance planning, and supervision. Strong leadership, adaptability, teamwork, interpersonal skills, strategic thinking, decision-making, and high commitment to results. Also I have experience in travels , I can make your travel of your dreams.

I build scalable, high-converting E-Mail Marketing & Lifecycle Automation systems that directly drive revenue and customer retention. With a background in marketing automation engineering and technical MarTech, I specialize in transforming raw customer data into personalized, automated email journeys that convert. What I do best: E-Mail Marketing & Lifecycle Strategy: End-to-end setup and optimization of high-ROI flows (Welcome, Abandoned Cart, Win-back, Post-Purchase) and targeted campaign strategy. Klaviyo Specialization: Advanced segmentation, dynamic email content, custom event tracking, and account setup. Deliverability & List Hygiene: Fixing inbox placement issues, technical DNS protocol setups (SPF, DKIM, DMARC), and database cleaning to maximize reach. Technical Integrations: Connecting your store (Shopify/WooCommerce) or CRM with custom webhooks, APIs, and automation tools (Make/n8n) to ensure seamless data flow. I deliver clean, well-documented, and high-performing email systems. Let’s discuss how to unlock more revenue from your subscriber list.

AI systems, automation workflows, and CRM/ERP integrations - built to run real business operations. If your CRM, operations, and reporting don’t match, you don’t have a system, you have a bottleneck. I help businesses turn fragmented tools and manual workflows into structured, scalable systems that actually run the company. I’m David Hidalgo - AI Engineer, Full-Stack Developer, and Business Automation Architect. I design and build systems where data flows correctly, processes are automated, and decisions are based on real‑time information. Most of my work starts when: • Teams outgrow their MVP • Tools stop syncing properly • Operations become manual and error‑prone • Reporting takes hours instead of minutes What I Build • Custom CRM & ERP systems aligned with real workflows (Odoo, Zoho, GoHighLevel) • End‑to‑end automation across operations, sales, and reporting (n8n, Make, Zapier) • Full‑stack SaaS platforms with automation built in from day one •Cross‑system integrations (CRM, payments, ops, analytics) •AI‑powered workflows (lead scoring, routing, decision automation) Notable Past Outcomes •Consolidated 4-6 disconnected tools into one unified system •Reduced manual operations by 40-60% through automation •Replaced manual reporting with real‑time dashboards •Eliminated data inconsistencies across sales, ops, and finance How I Work Most developers build features. I design systems. That means: • Defining where logic should live • Structuring clean data flow across systems • Building architecture that doesn’t break as you scale Because fixing bad systems later is always more expensive. Tech Stack • AI / Automation: OpenAI API, LangChain, LLM workflows, AI agents • Automation & CRM/ERP : n8n, Make, Zapier, Odoo, Zoho, GoHighLevel • Backend & APIs : Python (FastAPI, Django, Flask), Node.js, REST APIs, PostgreSQL • Frontend: React, Next.js, TypeScript • Infrastructure & DevOps : AWS, Docker, CI/CD pipelines, Linux What You Can Expect • Clear system design (not just code) • Fast and reliable execution • Solutions built for real operations, not demos Let’s Talk! If your systems are starting to break as you grow, tell me what’s not working - I’ll help you fix it.

I build AI-powered workflow automations that replace repetitive manual work with reliable, production-ready systems. If your team spends hours reading documents, searching for information, copying data between systems, or making repeatable decisions, I can help automate that process. My focus is not on adding AI for the sake of AI. I start with the business workflow: what people are doing today, where time and money are being lost, what can be automated safely, and where human judgment should remain in the loop. Examples of systems I've built include: • An AI customer-support agent deployed on WhatsApp that reduced manual support workload by 62% • A patent Office Action workflow that analyzes rejections, retrieves prior art and legal sources, proposes response strategies, and generates editable drafts - reducing first-draft preparation time by 89% • An appraisal-report processing system that extracts and validates 114 structured parameters using multiple LLMs, confidence scoring, and human approval - reducing extraction time by 73% • A browser-automation workflow that turns property search criteria into structured real-estate deal data, processing 100+ records in minutes instead of hours of manual research • A medical coding workflow that extracts procedures from clinical text, retrieves and ranks ICD-9 candidates, supports human review, and maps approved codes into DRG and billing outputs I can help with: • AI workflow and business-process automation • AI agents and tool-using systems • RAG, semantic search, and knowledge-base applications • Document extraction, classification, and structured data pipelines • LLM validation, confidence scoring, and human-in-the-loop systems • API, CRM, database, email, and third-party system integrations • Browser automation, scraping, and data-enrichment workflows • Production APIs, deployment, monitoring, and backend engineering Typical technologies: Python, FastAPI, OpenAI, Anthropic, Gemini, LangGraph, LangChain, RAG/vector search, SQL, Docker, GCP, REST APIs, Selenium, and related automation tools. I care especially about reliability. Production AI systems need more than a good prompt, they need validation, deterministic rules where appropriate, error handling, structured outputs, observability, and sensible escalation when the model is uncertain. Sometimes the right solution is an LLM. Sometimes it's conventional software or browser automation. Usually it's a combination. My job is to design the simplest system that reliably solves the business problem. If you have a manual workflow involving documents, emails, data, repetitive decisions, or several disconnected systems, send me a description of how it works today. I can help you determine what should be automated and design the system to do it.

I build AI-powered automation systems in Python and n8n that run 24/7 without babysitting , 30,000+ cases automated, €7,000,000+ processed with zero manual work. Businesses hire me when a workflow is eating their team's hours: reporting assembled by hand, leads qualified manually, documents processed one by one, data re-typed between tools that should talk to each other. What I deliver: - AI workflow automation : LLM-integrated pipelines (OpenAI, Claude APIs) for lead qualification, document processing, and reporting - Python automation systems : production-grade, with error handling, retries, and monitoring, so they still work six months from now - API integrations : QuickBooks, Slack, Google Sheets/Drive, Airtable, CRMs, and any REST API that needs to talk to another - n8n / Make / Zapier builds : when no-code is the right tool, I use it; when it isn't, I write the code Recent results (all on Upwork, all 5.0★): - Automated a Spanish government legal platform end-to-end , €7M+ in case value processed with zero manual intervention - Cut a US contractor's weekly workflow from 40 hours to 2 - Slack operations automation delivered in 4 days ($1,300 build) How I work: you describe the outcome, I send back a scoped plan with a pass/fail success test before we start. Clients' words, not mine: "excellent work that doesn't require babysitting" · "he delivers every time." Send me the workflow that's wasting your team's time , I'll reply with a Loom video showing exactly how I'd automate it.

I architect, develop, and deploy production-grade AI systems, complex workflow automations, and scalable backend infrastructure. Whether you need an intelligent multi-agent framework built with LangGraph, custom n8n orchestrations hosted on Docker, or high-volume data parsing pipelines — I build clean, deterministic, and maintainable software that solves real business problems. CORE EXPERTISE AND TECHNICAL STACK 1. Agentic AI and LLM Systems - Multi-Agent Architectures: LangGraph, LangChain, CrewAI, AutoGen - LLM Integrations: OpenAI, Anthropic, Gemini, DeepSeek - RAG and Knowledge Systems: Vector DBs, Hybrid Retrieval, Structured Prompt Engineering - Deterministic Outputs: Dynamic Tool Calling, Model Context Protocol, Structured JSON validation 2. Workflow Orchestration and Automation - Advanced n8n (Self-Hosted Docker and Cloud) and Make - Custom JavaScript and Python Nodes within workflow engines - Complex Webhook integrations, OAuth2 flows, and API refactoring - Robust error handling, retry logic, and fail-safe production pipelines 3. Backend and Data Engineering - Languages: Python, JavaScript, Node - Databases and Storage: PostgreSQL, Redis, Airtable, Supabase - High-Volume Parsers: Custom data extraction engines handling complex spreadsheets and reports - Containerization: Docker, Docker Compose, Linux VPS management PROVEN PRODUCTION CASE STUDIES * Multi-Agent SEO and AEO Audit Engine Designed a LangGraph-based orchestrator that consumes findings from specialized SEO, AEO, and performance agents to generate prioritized, actionable JSON recommendations. * High-Volume Financial Data Parsing Engine Built a modular multi-workflow n8n system running in Docker with custom JavaScript to parse, validate, and structure financial data from multiple spreadsheets under strict performance constraints. * Content Operations Hub Architected an end-to-end operational engine linking Telegram, n8n, and Airtable for dynamic content routing, automated approval flows, and multi-channel asset distribution. * AI Voice Dialer and Sales Agents Integrated AI voice engines and Twilio with backend webhooks to deploy conversational AI voice agents for automated commercial outreach. WHY WORK WITH ME - Production-Ready First: I write resilient, modular code designed for long-term production use. - Clear Technical Communication: I bridge the gap between business requirements and technical execution. - End-to-End Ownership: From initial architectural design to Docker deployment and post-launch monitoring. Available for fixed-price project deliverables, system audits, and long-term contract roles. Send me a message with your technical requirements or project scope, and let us turn your manual workflows into scalable AI systems.