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Alvaro Gomez RuanoAG

Alvaro Gomez Ruano

Senior Full Stack Developer & AI Engineer

€300/day
Barcelona, ES
15+ years

Average response time: 1 hour

About Alvaro

Desarrollador Full Stack Senior con más de 20 años construyendo productos digitales en producción para empresas de distintos sectores: salud, fintech, e-learning, plataformas sociales y energía.
Actualmente trabajo part-time como único ingeniero backend de Guia Repsol (apps Android, iOS y web con Node.js y NestJS), lo que me permite asumir nuevos proyectos en paralelo.
Mi foco reciente es AI Engineering aplicado a producto real: pipelines LLM con LangGraph y LangChain, arquitecturas RAG con OpenAI Assistants, e integración de APIs de voz conversacional (HeyGen, ElevenLabs, OpenAI Realtime, Azure Speech).
Resultados concretos que he entregado:
— De 15 días a 5 minutos en creación de contenido educativo, automatizado con LangGraph
— +22% en rendimiento de ventas para un cliente tras adoptar bots conversacionales con IA
— -50% en costes de CI/CD optimizando pipelines de GitLab
Disponible para proyectos en remoto o híbrido desde Barcelona como senior/lead engineer, consultor de AI o arquitecto backend.
  • Spanish

    Native or bilingual

  • Catalan

    Native or bilingual

  • English

    Fluent

Can work on-site
Barcelona (up to 50km)

Experience

  • Guia Repsol
    Backend Developer
    TRAVEL AND TOURISM
    October 2025 - Today (8 months)
    Barcelona, Spain
    Único ingeniero backend responsable de la arquitectura servidor de tres aplicaciones en producción: app móvil Repsol (Android e iOS), Repsol Profesionales y Repsol Empleados. Stack: Node.js y NestJS.
    — Diseño y mantenimiento de APIs REST consumidas por clientes móviles y web
    — Ownership completo del ciclo backend: arquitectura, implementación, despliegue y mantenimiento
    — Integración de sistemas de autenticación, bases de datos y servicios de terceros
    — Colaboración con equipos frontend/móvil para definir contratos de API y modelos de datos
    Node.js NestJs Microsoft Azure API REST MongoDB
  • Lernmi
    Software AI Engineer
    March 2024 - October 2025 (1 year and 7 months)
    Barcelona, Spain
    Built an AI-powered e-learning platform with intelligent training avatars, personalized learning, and real-time adaptive feedback.
    ▸ Automated course creation with LangGraph: reduced content development from 15 days (manual) to under 5 minutes.
    ▸ Implemented RAG with OpenAI Assistants in Python, significantly improving AI response accuracy and contextual relevance.
    ▸ Integrated HeyGen, ElevenLabs and OpenAI Realtime API for voice-based conversational training bots — one client reported a 22% increase in sales performance after adoption.
    ▸ Trained and deployed an Azure Speech model achieving higher accuracy in voice-to-text across diverse Spanish dialects.
    ▸ Boosted delivery speed by 50% using AI-assisted coding practices (Windsurf AI, Cursor).
    ▸ Full-stack (Ruby on Rails, JS, SCSS) and DevOps (Azure, GitLab, Docker, Kubernetes).
  • • · HumansDid
    Lead Engineer & Co-Founder
    October 2021 - December 2025 (4 years and 2 months)
    Barcelona, Spain
    Sole technical decision-maker for a social impact platform built from scratch. Led the full technology strategy, architecture, and delivery end-to-end — from stack selection to production — while also acting as Product Owner and coordinating all external technology partners.
    ▸ Designed and built the full platform: Next.js frontend, Strapi (Node.js) backend, PostgreSQL, hosted on AWS with Docker and GitLab CI/CD.
    ▸ Implemented Ethereum smart contracts in Solidity for platform engagement features.
    ▸ Integrated WordPress for the public website, plus Zapier, Facebook and other third-party services.
    ▸ Defined all technical standards, architecture decisions and Agile/SCRUM delivery processes as sole engineer on the team.
    ▸ Led communication and technical coordination with all external technology partners.

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Education

  • Higher Technician in Software Development
    Escola Nuria Perpinyà1999
    2001
    Higher Technician in Software Development
  • High School Diploma (COU)
    Institut Montserrat
    1998
    High School Diploma (COU)

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