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Gigioxx/README.md

Hi, I'm Guillermo

Senior Full Stack & AI Engineer · Next.js · TypeScript · React Native · AI Agents

I design and build high-performance web and mobile products, with a strong focus on DX, scalability, and AI-native experiences. I like taking ideas from zero to production: architecture, implementation, and performance tuning.

I ship with AI as a teammate (Claude Code, Cursor, Copilot) using human-validated workflows: plan → implement → review → refactor. I lean on Claude Code heavily for large refactors, migrations, and speeding up high-signal code reviews without lowering standards.

What I work on

  • Performance, DX, and scalable frontends (Next.js, React, TanStack Query)
  • Cross-platform product engineering (React Native, Expo, shared TypeScript codebases)
  • Backend APIs and systems (NestJS, Firebase/GCP, AWS)
  • AI-native features (LLM integrations, tool calling, agent-style workflows)

Stack (most used)

Area Tech
Web React Next.js TypeScript Tailwind CSS shadcn/ui TanStack Query Zustand
Mobile React Native Expo EAS MMKV FlashList/LegendList
Backend & APIs Node.js NestJS REST GraphQL Firebase Admin
AI / Workflow Claude Code Cursor GitHub Copilot LLM tool calling AI agents
Databases Postgres Supabase Firebase
Cloud / Infra Vercel GCP/Firebase AWS Lambda Docker Terraform GitHub Actions Nx
Testing Playwright Vitest Jest
Tooling Bun pnpm oxlint oxfmt

Links

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