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El-Mundos/README.md

Hi there 👋 I'm Sergio.

Systems Engineer, Full-Stack Developer & Linux Hardener.

AUR Maintainer

I provide high-performance technical solutions by bridging the gap between sophisticated software development and rock-solid system infrastructure. Whether it's compiling a custom Linux Kernel or building a Next.js frontend, I focus on efficiency, security, and the "metal" underneath.

🚀 The Stack:

  • Systems & Low-Level: Linux (LFS, Arch), Rust (Contributor to @spotatui), C/C++, Bash.
  • Data & Backend: Python (FastAPI/Django), SQL (PostgreSQL), Azure Cloud & Databricks (Architecture Focus).
  • Web & Full-Stack: Next.js, React, TypeScript.
  • Infrastructure: Docker, Wireguard, Enterprise Hardware (Xeon/SAS).

💼 Commercial Portfolio (Client Work)

Most of my code is proprietary (NDA), but here are the key architectures I've built:

🏢 Real Estate Data Engine (The "Big One")

  • Context: Massive management system for a firm handling 400+ residential communities.
  • Engineering:
    • Migrated legacy data into a clean PostgreSQL architecture.
    • Wrote Python ETL pipelines and optimized SQL queries, reducing report latency by ~60%.
    • Handles thousands of financial records and incident reports daily.

🖥️ Custom Infrastructure Dashboard

  • Context: Full-stack monitoring solution delivered to a client for server fleet management.
  • Tech: Docker, Bash, Systemd.
  • Engineering: Real-time visualization of resources (RAM/CPU/IO), Docker health checks, and automated alert systems.

⚡ High-Concurrency Automation

  • Context: "Grey Hat" style automation for high-demand booking services (Gyms/Events).
  • Tech: Python, Selenium/Playwright.
  • Engineering: Implemented session management, header rotation, and logic to evade bot detection.

🏠 The Homelab (My Production Environment)

I don't just deploy to the cloud; I host on the metal.

  • Hardware: Running on Enterprise Intel Xeon & RDIMM RAM.
  • Networking: Wireguard VPN tunnels for secure remote access.
  • Services: * VideoVisionary: Custom web hosting and streaming architecture.
    • Mail & Privacy: Self-hosted disposable email tools and media servers.
  • Security: Hardened with Fail2Ban, UFW, and strict network segmentation.

"I adapt to any environment. From high-level UI/UX logic to low-level kernel debugging, I make it run."

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