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Web developer

Sites that load in one second

Web development built around one number: how many calls come in. Measured with the same public tools you can run yourself — no smoke.

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Work

Real work, with the number it moved.

Prospecting demo factory

2026

A Python pipeline that discovers trade businesses via Google Places, audits their current site with Google's own public APIs (PageSpeed, Chrome UX Report), generates a demo from the business's real data, and publishes it before first contact.

Result ~400 automated tests, 6 chained stages, zero external dependencies in each generated site

  • Python
  • FastAPI
  • PostgreSQL
  • Jinja2
  • Cloudflare Pages
Private
Juan Cruz Eiriz

About me

I'm a full-stack developer — Python, Django REST Framework, and React are my day-to-day. I work with service businesses that depend on the phone to make money, and I measure the result with the same public tools you can run yourself: PageSpeed Insights, Chrome UX Report, and Lighthouse. Nothing I say about a site is an opinion — it's a number you can verify on the spot.

Experience

  1. 2021-12 — Present

    Software Developer — Django REST Framework (Python)

    Market One — PHI (Cost-to-Serve & Profit Management Software)

    • Django REST Framework backend for a cost-to-serve and profitability management product.
    • Stack: Python (Django, Flask, Pandas), Docker, Azure, Google App Engine, Databricks, React.
    • Persistence across PostgreSQL, SQL Server, MySQL and MongoDB depending on the project.
  2. 2020-02 — 2022-01

    Full-stack Python developer

    Freelance

    • Web application development and script maintenance with Flask and Django for various clients.
  3. 2021-05 — 2021-12

    Full-stack PHP and React developer

    UTN — Buenos Aires

    • Development and maintenance of internal university systems with Symfony, CakePHP and React.
    • OOP, agile methodology, Docker.
  4. 2018-09 — 2021-08

    Application analyst and support

    UTN — Buenos Aires

    • Support for staff and students via ticket, phone and in person.
    • Database management: inserts, updates, stored procedures, triggers and join-based reports.
    • Analysis, implementation and maintenance of internal projects; Python scripts.
  5. 2017-06 — 2018-07

    Technical support

    Stefanini Argentina

    • Phone support; incident analysis, tracking and resolution; remote assistance and troubleshooting.

Certifications

Most link to a public verification; the rest are available on request.

Résumé

The full detail, in your language.

Download CV (Spanish) Download CV (English)

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