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mariolqn/README.md

Mario Lemos Quirino Neto

Director of Information Technology | AI and Cloud Engineer | Systems Architect | Full-Stack Developer


About Me

I am a technology professional focused on building secure, scalable, and intelligent systems that integrate hardware, software, and cloud infrastructure.

With over five years of experience in Python, two in Next.js, and additional experience in Swift, Node.js, and TypeScript, I specialize in creating robust applications and automated environments that bridge software development and infrastructure management.

My professional path combines hands-on technical expertise with leadership. After several years working as a developer and systems administrator, I transitioned into my current role as Director of Information Technology for a regional retail group. There, I oversee infrastructure modernization, cloud migration, cybersecurity, and AI-driven automation initiatives.


Current Focus

My main focus is on end-to-end technology development and systems optimization. This includes:

  • Designing and deploying hybrid cloud environments using AWS, Google Cloud, and Azure.
  • Implementing automation pipelines with Terraform, Docker, and GitHub Actions.
  • Building and securing internal APIs and full-stack applications using Python, Next.js, and TypeScript.
  • Developing AI-assisted tools to improve efficiency and reduce human error in production systems.
  • Leading infrastructure hardening and zero-trust security practices across all operations.

Technical Expertise

Programming and Frameworks: Python, JavaScript/TypeScript, Next.js, React, Node.js, Swift, Bash.
Cloud and DevOps: AWS (EC2, S3, RDS, Lambda), Google Cloud Platform, Microsoft Azure, Cloudflare Workers, Docker, Terraform, GitHub Actions, CI/CD.
Systems Administration: Linux (Ubuntu, Debian), Windows Server, virtualization (Proxmox), VPNs, firewalls, and identity management (SSO, SCIM).
Databases: MySQL, PostgreSQL, SQLite, Firebase, Kafka, Redis.
Security: Network hardening, incident response, encryption protocols, access management, and Zero-Trust architecture.
AI and Automation: LLM integration (OpenAI, Claude, Gemini), prompt engineering, AI-based refactoring, and automated code analysis.


Featured Projects

Custom Cloudflare Error Pages
A modern collection of responsive, accessible, and performance-optimized error pages for Cloudflare. It includes automatic R2 synchronization via GitHub Actions, inline critical CSS, and Glassmorphism UI design.

Reverse Machine
An open-source JavaScript deobfuscation tool powered by AI. It uses AST-level transformations, contextual variable renaming, and multi-model (OpenAI, Gemini, Claude) integration to produce human-readable, semantically equivalent code.

Resend Email Bridge
A production-grade SMTP and Cloudflare Workers bridge that integrates Apple Mail with Resend’s email service. It features end-to-end encryption, structured logging, retry mechanisms, and health monitoring for enterprise-grade reliability.


Philosophy

Technology leadership is about clarity, accountability, and the ability to connect the smallest technical decision to the largest business outcome.
I believe in designing systems that are not only functional and efficient but resilient, elegant, and secure. My goal is to keep expanding my understanding of the intersection between automation, intelligence, and human creativity.


Contact

You can reach me on LinkedIn or explore my work here on GitHub.
For professional collaborations, inquiries, or open-source discussions, feel free to connect.

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