Tested in real use
Every app is used daily before each release. Family testing with real users, not just ideal cases.
Juan Antonio García Guillén
Front End Software Engineer · React · Flutter · Node.js
I have 8 years of experience building scalable web applications with React, Next.js, and Node.js. I've led teams of up to 10 developers, defining frontend architecture, coding standards, and testing strategies. I currently develop mobile apps with Flutter, integrating AI tools (Claude Code, Gemini, GitHub Copilot) into my daily development workflow.
Professional experience
- Designed, developed and published 4 mobile apps (Propina³, Conversor³, Dado³, Suma³) with Flutter + BLoC, dual monetization (AdMob + in-app purchases), 6-language support and WCAG AA accessibility
- Implemented an AI-assisted development workflow with Claude Code, Gemini and GitHub Copilot, using Spec-Driven Development and automated verification harness to accelerate delivery as a solo developer
FlutterDartBlocFirebaseAdMob
- Contributed to the CMS migration from Edito 80 to Arc-XP
- Built plugins and pages for the group's verticals, creating reusable components with a focus on accessibility
JavaScriptArc-XPCMS
- Led a team of 10 developers, defining architecture, code standards and testing strategy for products with millions of monthly users
- Collaborated with product, UX and backend to define the frontend architecture and shared services
- Made technical decisions focused on performance and accessibility on a high-traffic platform
ReactNode.jsMicroservicesTesting
- Built modular plugins for the CMS used daily by 100+ editors, enabling dynamic content across multiple group verticals
- Developed internal tools that automated editorial team workflows, reducing manual work
JavaScriptCMSPlugins
- Led a team of 5 developers, planning weekly sprints and defining the quarterly product roadmap
- Translated business requirements into technical solutions with React and GraphQL
ReactGraphQLSprints
- Developed an MDM (Master Data Management) system with dynamic form generation from JSON schemas
- Maintained and extended a data governance platform, implementing new features
ReactJSONMDM
- Built a risk analysis web app (app.qibo.io) with Angular and Ionic
- Built a centralized procurement platform for P&G (pg.sourcedata.mx)
AngularIonicTypeScript
- Built and maintained websites for clients (livean.com.mx, hautedesign.com.mx, zuko.com.mx)
HTMLCSSJavaScriptWordPress
Personal project
García³ Apps was born from the vision of a frontend developer with 8 years of experience: everyday tools can be better. Each app is designed, developed, and tested in real daily use before publishing. No huge teams, no committees. Just one person solving real problems with professional-quality software.
One app, one job
One main function per app. Minimalist but polished UI. Works out-of-the-box.
Zero warnings, 60 FPS
Zero warnings in static analysis. Constant 60 FPS. Under 2 seconds response time.
Tech stack
ReactTypeScriptJavaScriptNext.jsAngular 2+HTML5CSSSassTailwindStorybook
Education
2017 — 2018
Full Stack Bootcamp — Be Tech
Full Stack JavaScript Web Developer
2017
Universidad Abierta y a Distancia de México
Software Development Engineering
2004 — 2007
CECyTEM — Technical High School
Computer Equipment Maintenance and Systems Technician