Zeferino Martínez García

Web platform to manage activities and prioritize them with the GUT scoring model. Service was discontinued as of April 2026.

GUT helps teams prioritize tasks with clear, objective criteria.

Users classify work for faster decisions and better organization.

Features include auth, activity board, task CRUD, priority views, PDF export sorted by priority, and a metrics dashboard.

Includes light and dark themes.

It ran from 2023 and stayed stable from 2024 onward; as of April 2026 the service was discontinued.

I led technical and UI work; field structure and organization with Daniela González.

Custom web app extending a limited ERP—JWT auth, REST APIs, and many functional modules.

Built for a company that preferred extending its ERP instead of replacing it.

Connects to the ERP database, pulls critical data, and adds MySQL structures for bespoke processes.

JWT auth, responsive UI, hosted on Ubuntu configured from scratch.

CRUD across the product; 13 main modules and 37 submodules. REST APIs consumed from Excel and Power BI.

Actively growing with departmental needs.

Database structure and much of the module design was led by Ángel Vega.

Bilingual corporate website built with Astro, React, and WordPress as a CMS, together with the marketing team.

This portal is AG Group’s official digital presence—company, services, and values in a professional, modern format.

Built with Astro and React for performance and smooth UX. WordPress powers media, ongoing content updates, and contact-form email delivery.

PHP handles the form backend for reliable message processing.

Two locales: English on the primary domain and Spanish on the es. subdomain.

Marketing supplied design; I owned end-to-end technical implementation.

Interactive branching paranormal stories—a personal full-stack web project.

A text-forward game where player decisions change how each paranormal story unfolds.

Minimal “terminal black” UI: sign-up, sign-in, and short stories with unique paths—from zombies and aliens to astral travel.

Multiple endings per story; ongoing work to add stories, features, and visual polish.

Built from scratch with React, Django, and PostgreSQL; JWT auth; API tested in Postman. Backend runs on Ubuntu (IONOS VPS) with Hostinger for additional pieces.

An API and UI for developers who want to exercise against a real backend without hosting their own.

Biz JSON serves business resources (products, customers, invoices, delivery notes) plus reference catalogs (categories, lines, brands, providers, product statuses, document types, sales channels, sales reps). Only documented query parameters are accepted; unknown query names return 400 with Spanish `errors` payloads.

Pagination surfaces numeric fields in `meta.pagination` (`page`, `pageSize`, `pageCount`, `total`). Supported params include `page` (≥ 1), `page_size` (1–100, default 20), `fields` for first-level columns, `sort_by` (`id` or `name`), and `order` (`asc` or `desc`). Anything outside those rules yields 400 with structured errors.

Examples are typed-friendly, but you can skip typing if you prefer a looser workflow.

The UI ships with light and dark themes; English locale support is planned. Hosting spans Django + PostgreSQL, Cloudflare, Hostinger, and Ubuntu; auth issues short-lived tokens with configurable limits.