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Víctor G.VG

Víctor G.

Fractional CTO

€1,500/day
Madrid, ES
15+ years

Average response time: 1 hour

About Víctor

Fractional CTO and technical founder with a PhD in AI/Robotics and an Executive MBA. 20+ years across the field: AI & Robotics research (building conversational agents for social robots nearly a decade before ChatGPT), global data science leadership at Telefónica, founding a sportech startup, and most recently taking a consumer health-tech company from zero to launched product as fractional CTO. I treat product and technology as a single decision, not two, and I build AI agent systems hands-on.
  • English

    Native or bilingual

  • Spanish

    Native or bilingual

  • Catalan

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • WELLBEINN - Consumer Health-Tech
    Fractional CTO
    TECH
    February 2026 - Today (4 months)
    Madrid, Spain
    Took an early-stage consumer health-tech startup from zero to a launch MVP, live on iOS App Store and Google Play. Built shoulder-to-shoulder with the CEO and co-founders, owning strategy, technology, science, hiring, and CTO succession. Reframed the product vision from a single-device app to a multi-hardware ecosystem unified through one AI-driven engine; designed the AI roadmap (proactive conversational agents, real-time wearable data action recommendations) as the next post-MVP differentiator. Architected and shipped a production-grade Flutter + Firebase platform, structured so the incoming CTO inherits velocity instead of technical debt; cloud, sync, monitoring and release pipeline running unattended. Built the scientific layer as a differentiator lever: a 17-metric foundation grounded in 100+ peer-reviewed papers, designed so successive waves of metrics extend the same rail. Evaluated 3 hardware manufacturers (2 ruled out on technical grounds); led the JD, interviews and technical-gate decision for the incoming full-time CTO; coached the CEO and team through the retail→tech transition.
    CTO Wearables Product Strategy
  • FITIZENS - Sportech
    Cofounder & CEO
    TECH
    September 2021 - Today (4 years and 9 months)
    Madrid, Spain
    Founded and led a bootstrapped sportech startup building an agentic AI video coach that analyzes exercise technique and delivers personalized feedback; shipped a complete product to iOS and Android. Built the entire technology stack: Flutter app (clean architecture), Python/Firebase backend (Cloud Functions Gen 2, Firestore), and a TensorFlow ML pipeline for exercise recognition. Designed an AI agent system for post-workout feedback (NPS 56 on the first version) governed by a 530+ rubric library that adapts agent behavior by context. Owned product, strategy, go-to-market, marketing and customer development; ran market validation across 100+ users and 30 trainers.
    AI Agents AI Product Strategy Wearables
  • IE BUSINESS SCHOOL
    Adjunct Professor
    November 2019 - Today (6 years and 7 months)
    Madrid, Spain
    Teach AI strategy and implementation in Executive MBA programs; translate AI capability, and its limits, for senior non-technical audiences.

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Education

  • Executive MBA
    IE Business School
    2019
    Executive MBA
  • PhD, AI & Robotics
    Universidad Carlos III de Madrid
    2015
    PhD, AI & Robotics. Best Thesis Award

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