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Juan Fernandez — Full Stack Developer

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I build web products end to end — from the database schema to the pixel that ships. Most of my work is Next.js + PostgreSQL: e-commerce, operations dashboards and platforms that have to stay up under real traffic. I also write C# / .NET for Windows desktop tooling, and I spend a growing share of my time on AI automation and developer tooling.

Available for new projects

What I work on

🌐 Web products & e-commerce

Full storefronts with auth, payments, inventory and admin dashboards.

Next.js TypeScript PostgreSQL Auth.js

🧠 AI & automation

Agents, bots and tooling that delete manual steps out of a workflow.

Python Playwright Node.js LLM APIs

  • gcp-oauth-automator ⭐ — one command, zero manual clicks: provisions Google OAuth clients in GCP via Playwright
  • Plus a few private agentic bots I maintain: Telegram → Marketplace publishing, and an AI curation pipeline that scrapes, rewrites and posts repos to X

🎨 UI engineering & design systems

  • glass-refraction38 — Liquid Glass design system: CSS + React components with real SVG refraction, specular highlights and chromatic edge dispersion

🖥️ Systems, desktop & infrastructure

C# .NET 8 Java MariaDB

  • AirPodsLink — makes AirPods connect faster on Windows: Bluetooth LE detection plus an A2DP reconnect request, no drivers
  • Windows-RGB-Hotkeys — global hotkeys for OpenRGB devices
  • L2J · Lineage II game servers — persistent MMORPG worlds: login, gameplay, databases, launchers and production infrastructure

❤️ Open source & civic tech

  • SOS Venezuela 20266 — real-time collaborative map after the June 24 M7.5 earthquake. The first web app deployed after the quake: damage reports, missing-person search, shelters and an open API
  • deepseek-status-bar-for-copilot — VS Code status bar with real DeepSeek cost tracking and a peak/off-peak rate badge with countdown

Tech I reach for

TypeScript React Next.js Node.js PostgreSQL .NET C# Python Java Docker Git NVIDIA CUDA

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Have a project in mind?

I'm available for new projects and collaborations. Let's talk.

WhatsApp Portfolio SOS Venezuela 2026

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