👋 Hey, I'm Alex G

Fullstack Developer | AWS Microservices | IoT Enthusiast | 🇲🇽 Based in Aguascalientes, Mexico

Freelance fullstack developer building scalable systems with microservices architecture and modern cloud technologies. Previously at LinkThinks (Nov 2024 – Mar 2026).

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🚀 What I'm Working On

• 🔐 Biometric Orchestration Engine — Python (FastAPI/Asyncio) + WebSockets for automatic face/fingerprint replication across Hikvision devices, eliminating 100% of manual on-site admin work
• 🛒 B2B/B2C E-Commerce (Omicron/PCSmart) — Refactoring legacy Angular + Express.js + MongoDB platforms with 100+ monthly orders; centralized email system & Elastic Search migration
• 💰 Financial Microservices (Percapita) — 2 microservices with Micronaut + MySQL on RDS, deployed on AWS (ECS, EC2, Lambda, Docker), JWT auth & 75% reduction in reconciliation errors
• 🔬 SafeLab IoT — Gas detection system using ESP32 + Next.js + React Native (University Research Project, published)

🛠️ Tech Stack & Expertise

Backend & Cloud:

• Java (Micronaut, Spring Boot), Node.js (Express), Python (Flask, FastAPI)
• AWS (ECS, EC2, Lambda, RDS), Docker
• MySQL, PostgreSQL, MongoDB, SQL Server

Frontend & Mobile:

• React, Angular, Vue.js, Next.js, TypeScript
• React Native, Flutter
• Tailwind CSS, MUI

IoT & Hardware:

• ESP32, Arduino, MQ Sensors, C++
• Real-time communication with WebSockets

Networking & Security:

• CCNA Certified (Enterprise Networking, Security & Automation — 2024)
• VLANs, ACLs, OSPF, LAN/WAN, Cisco CLI

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🎯 Current Focus

const alex = {
    code: ["Java", "TypeScript", "Python", "JavaScript"],
    architecture: ["Microservices", "REST APIs", "Real-time Systems", "IoT"],
    cloud: ["AWS", "Docker"],
    currentlyLearning: ["Advanced Python Frameworks (FastAPI/Asyncio)", "TypeScript Patterns"],
    certifications: ["CCNA", "Cybersecurity Fundamentals", "Intro to Data Science"],
    workingOn: "Freelance projects — fullstack systems, microservices & IoT",
    languages: { native: "Spanish", professional: "English (B2)" }
}

📈 GitHub Analytics

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🌟 Featured Projects

🔐 [Biometric Orchestration Engine] — Python FastAPI/Asyncio + WebSockets for multi-branch Hikvision device sync
💰 [Financial Microservices — Percapita] — Micronaut + AWS architecture with JWT auth & external API integration
🛒 [E-Commerce B2B/B2C — Omicron/PCSmart] — Legacy refactor with Angular + Express.js + MongoDB + Elastic Search
⚗️ [SafeLab IoT] — Real-time gas detection with mobile & web dashboards (published research)

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🤝 Let's Connect

📧 Email: jalejandrogtzrdz@gmail.com
💼 LinkedIn: alejandro-gutierrez-4907a9239
🎯 Status: Freelancing & open to collaborations on interesting projects

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"Passionate about building scalable, secure solutions that solve real-world problems"