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Marcos SanzMS

Marcos Sanz

AI Engineer & App Builder

€400/day
Valencia, ES
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Marcos

Do you want to integrate AI into your business without ending up with a pilot project that gets shelved? I help you design and implementartificial intelligencesolutions that generate measurable results from the first few weeks.

I'm Marcos, founder of Maistik Studio. I've been developing software for over 20 years, and in recent years, I've led AI projects for companies like Iryo, Lab Rubio, Forus, Bounsel, Fibsen, among many others, helping them turn AI into a real competitive advantage, not just a pretty demo that no one uses.

How can we help you?
  • Development of custom AI agents and Business Copilots
  • Integration of LLMs (OpenAI, Anthropic, open source models) into your products and processes
  • Development of complex models and fine-tuning of LLMs.
  • Intelligent automation of internal processes: customer service, document management, sales, operations
  • AI strategic consulting: from discovery to technical roadmap
  • MVPs and functional prototypes in record time
  • Scalable, secure, and production-ready architecture

What sets us apart?
  • Technical focus with business vision: I don't build AI for the sake of it, but to solve specific and profitable problems
  • Constant and proactive communication throughout the project
  • Proven experience in SaaS, LegalTech, HealthTech, FinTech, TravelTech, and productivity tools
  • Own studio: I can scale from freelance to a full team depending on your needs
If you have an idea, an operational problem that you believe AI can solve, or are looking for a technical partner who understands both code and business, let's talk. The first call is always to understand your challenge and see if we're a good fit.
  • Spanish

    Native or bilingual

  • Catalan

    Fluent

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • University of Valencia
    Professor
    EDUCATION AND E-LEARNING
    April 2024 - Today (2 years and 4 months)
    Valencia, Spain
    Teaching Law students "Coding for Lawyers" — a hands-on program bridging legal practice and technology. Students learn Python, data analysis with Pandas and Jupyter, and applied AI to automate legal workflows: contract review, document classification, case research and regulatory monitoring. Real-world legal use cases combined with modern tools, preparing future lawyers to collaborate with technical teams and leverage AI in law firms and legaltech.
    Python Teaching Artificial Intelligence Jupyter Pandas
  • Maistik Studio
    Co-Founder
    SOFTWARE PUBLISHING
    July 2023 - Today (3 years and 1 month)
    Valencia, Spain
    Founder of Maistik Studio, a boutique AI and software consultancy. We help startups and companies turn AI into real competitive advantage — designing strategy, architecture and operations end-to-end. We build custom AI agents, Business Copilots, LLM integrations and automation systems that improve efficiency and decision-making. Trusted by companies in SaaS, LegalTech, TravelTech, productivity, among others. From discovery and rapid prototyping to production-ready solutions, with senior engineering and a clear focus on business impact.
    Artificial Intelligence Large Language Models User Experience Design Web Applications Typescript
  • Bounsel
    CTO & Co-Founder
    SOFTWARE PUBLISHING
    November 2018 - Today (7 years and 9 months)
    Valencia, Spain
    Co-founded a Valencia-based LegalTech startup building a secure, scalable SaaS for B2B contract collaboration powered by AI and Big Data Analytics. Led product and tech end-to-end: from architecture and engineering to AI integration for clause analysis, contract automation, document classification and risk detection. Designed multi-tenant infrastructure ready to scale to enterprise clients, with a strong focus on data security, compliance and UX. Hands-on experience taking a SaaS product from zero to market and growing it into a tool used daily by legal and operations teams.
    Artificial Intelligence Typescript Legaltech SAAS B2B

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Education

  • Insurance Broker (Group A
    Insurance Broker (Group A
  • Insurance Broker (Group B - Spanish
    Insurance Broker (Group B - Spanish

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