Full Stack Developer & UX/UI Designer — Freelance
December 2024 — Present
- Built end to end the management system for Lavandería El Sol (React 19, Node.js/Express 5, PostgreSQL): customers, orders, machines, inventory, cash register, reports and multi-branch support.
- Integrated IoT hardware control with Sonoff/eWeLink relays over OAuth, so a washing machine only gets power once its order has been paid.
- Designed before coding: client research, wireframes, high-fidelity interface, component library and a clickable Figma prototype, validated before writing a line of code.
- Built a headless platform for Senderos de Chiapas (Next.js + Strapi, modular SASS, Resend) that lets the client manage tours and content without going through a developer.
- Designed the data model and architecture: REST API, JWT authentication with roles, multi-branch support and a device layer.
- Deployed and ran it in production on Vercel, Netlify and Fly.io, with automated migrations and a deployment pipeline.
- Wrote automated tests for backend and frontend, ran a security audit and produced the project's technical documentation.
- Designed mobile-first, with a color system driven by state, a type scale tied to function and immediate feedback on every action.
React TypeScript Next.js Astro Node.js + Express PostgreSQL Tailwind CSS IoT (Sonoff) UI/UX Figma Vercel / Fly.io