I build web products that run in production and AI agents and automations that remove repetitive work from real businesses.

I came to software from the business side. For over 12 years I ran my own company, managing a physical shop, online sales and events, and I spent 6 years in passenger road transport, where safety, punctuality and customer service are non-negotiable. That experience is the core of how I work: I start from the business process, then write the software that fixes it.

Since 2024 I have been developing full stack applications with AI agents as a freelancer. I completed the Full Stack Developer Master's at 4Geeks Academy in 2026, I'm currently studying AI Engineering, and in September 2026 I founded NexuraIA, a technology company focused on artificial intelligence, process automation and business software.

• 📍 Madrid, Spain · Remote-friendly
• 🚀 Focus: full stack SaaS · AI agents & voice assistants · process automation with n8n
• 🤝 Open to: client projects, collaborations and full stack / AI engineering opportunities

• 🤖 Studying AI Engineering at 4Geeks Academy (generative AI, LLM-based products)
• 🏗️ Improving software architecture: clean architecture, SOLID, moving monoliths towards services
• 🧪 Strengthening testing: unit & integration tests against real databases
• 🔁 Setting up CI/CD pipelines with GitHub Actions

• 🤖 AI Engineering — 4Geeks Academy · Sep 2026 – Feb 2027 (in progress)
• 💻 Full Stack Developer Master's (Full Stack & AI) — 4Geeks Academy · Oct 2025 – May 2026
• 📜 Full Stack con IA certification — 4Geeks Academy · May 2026
• 📜 GitHub Copilot — Santander Open Academy · Sep 2025
• 📈 Business Creation & Management — Impulso 06 · 2020
• 📜 Digital Marketing Fundamentals — Google · 2020
• 🧑‍🏫 Train the Trainer (380 h) — Euroinnova · 2013

Frontend

Backend & Data

Web3 & Security

AI & Automation

DevOps & Tooling

Cloud platform that centralises the work of Spanish property management offices (administración de fincas) and their owners' associations: legally compliant owners' meetings, accounting, SEPA direct debits, bank reconciliation and tax forms — across the whole portfolio at once.

• Stack: React 19, Vite, Tailwind CSS v4 · Node.js, Express · PostgreSQL with versioned migrations · Docker on a self-hosted VPS
• Highlights:
  • Live voting from mobile, vote delegation and AI transcription of each owner's speech
  • Tamper-evident ledger chained with SHA-256 hashes; signed minutes with integrity fingerprint
  • Norma 43 bank statement import with rule-learning reconciliation; SEPA pain.008 / pain.001 files
  • Generates Spanish tax forms (111, 190, 347) · tenant isolation · role-based access · GDPR
  • 280 automated tests (206 route tests + 74 against a real PostgreSQL)
• 🔗 Live · 🔒 Private repo

AI assistant on nexuraia.com that answers by voice when you speak and by text when you write.

• Stack: n8n workflows · self-hosted Whisper (faster-whisper) for speech-to-text · Google Gemini agent with session memory · Docker
• Highlights: end-to-end pipeline webhook → transcription → AI agent → response, fully self-hosted to keep costs and data under control

Proof of concept for secure digital voting in Spain: it checks voter eligibility with official Spanish identity documents while keeping the vote anonymous on-chain, and lets anyone recount the results from the contract's public events.

• Stack: Next.js · TypeScript · Solidity smart contracts (Hardhat, Ethereum Sepolia testnet) · PostgreSQL · Zod · pnpm monorepo · Docker on a self-hosted VPS
• Highlights:
  • Zero-knowledge identity with ZKPassport: the DNIe/passport chip proves age and nationality, and the proof is verified inside the smart contract, not on a server
  • Spanish digital certificate login via Autofirma: CAdES signature validation, trust chain up to FNMT / DGP and OCSP revocation checks
  • One vote per person with nullifiers; each proof is bound to the chosen option so it can't be reused
  • Engineering documentation: architecture decision records (ADRs), threat model and security audit
  • Accessibility: audio reading of the ballot with a privacy warning before anything is read aloud
• 🔗 Live demo · 📁 Source · AGPL-3.0

Free audit and paid process-diagnosis questionnaires that NexuraIA uses to qualify new business clients.

• Stack: HTML/JS · Stripe payment links · n8n webhooks · Nginx in Docker
• Highlights: payment gate with Stripe before the paid questionnaire, private invitation links that bypass payment, answers routed to n8n for automatic processing and email alerts
• 🔗 Live · 🔒 Private repo

Digitalises and automates the processes of a car repair workshop: service catalogue, online booking for registered customers and an internal management panel.

• Stack: React + Vite, React Router, Bootstrap · Flask, SQLAlchemy, Flask-Migrate · JWT auth · PostgreSQL (Neon) · Flask-Mail
• Highlights: customer area with booking history, admin-only management panel with client notes, email confirmations, split deploy Vercel + Render
• 🔗 Live · 📁 Source

• 🏫 GECAP — Management system for primary schools: forms, data management and statistics. Final team project of the 4Geeks Academy Master's (React, Flask, PostgreSQL). Live
• 🌐 Personal Portfolio — React, Tailwind CSS, Vercel.

Every repository is tagged by purpose, so each group is one click away.

_{Last updated: November 2026}