Senior Engineering Expertise
Zintra is a technology consultancy founded in June 2026 by senior engineers with a track record in high-stakes positions across San Francisco, New York, London, Amsterdam, and Barcelona.
Nearly a decade building technology that has changed the world
Founded by a Lead Engineer after nearly a decade as a contractor impacting private companies such as CaixaBank, HSBC, Cursor, Machinify, Holaluz, Cambridge University Press, or Chelsea FC, as well as public entities like the governments of the United States, Canada, or Italy.
I've led projects from architecture to deployment, shipping production code in fintech, healthtech, e-commerce, and SaaS. Every project reinforced the same conviction: quality comes from experience, not team size.
Zintra was born from that conviction: a consultancy where experts take ownership of your problem as if it were their own, eliminating middlemen, uncertainty, ambiguities, and sales promises that overlook every technical detail. Grounded in three pillars that can only be achieved by being technical experts:
Predictable timelines and investment. Measurable results. Scalability by default.
Tony Sánchez
Founder & Lead Engineer
Senior software engineer with nearly a decade of experience leading projects end-to-end. Specialized in modern web architectures, distributed systems, and applied AI solutions. I've worked with early-stage startups and established enterprises alike, always with the same standard: clean code, scalable systems, and transparent communication.
Barcelona (CET, GMT+2)
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