Marcio Cunha

Automation, infrastructure, and software. Without boundaries.

Software Engineer with experience in development, networks, automation, and infrastructure. Since 2013, I have written about technology, automation, and the tools I use day to day.

Focus Areas & Expertise

Modern Web & Frontend

Next.js, React 19, TypeScript, PHP, MySQL, Tailwind CSS, Core Web Vitals optimization, and Local-First architectures.

Applied Artificial Intelligence

Loop Engineering, vector databases, Answer Engine Optimization (AEO), and LLM API integrations (Gemini, Claude).

System Architecture

Distributed systems, relational data modeling, microservices, high-availability REST/GraphQL APIs, and resilience patterns.

Harness & Reliability

Safe constraint design, continuous testing, automated feedback loops, observability, and sustainable engineering practices.

Infrastructure, Data Centers & DevOps

Linux and Windows Server environments, data center operations, containerization with Docker and OrbStack, deployment automation, Coolify, and production VPS.

Networks & Automation

Network protocols (TCP/IP, DNS), secure connectivity, building and industrial automation (BACnet, Modbus, LonWorks), and IoT.

Featured Articles

Recent publications on technology, software development, and infrastructure.

View all articles

How the SSH Protocol Works: Anatomy of a Secure Connection

Discover the inner workings of the SSH protocol, from the initial cryptographic key exchange to opening secure tunnels for remote server management.

Linux Kernel: The Core Engine and Its Vital Role in the Operating System

Explore how the Linux Kernel manages hardware, memory, and processes behind the scenes. Discover the core component powering modern computing infrastructure.

Prometheus and Grafana: How to Build a Modern Monitoring Stack

Learn how to build a robust observability architecture using Prometheus for metric collection and Grafana for real-time visualization.

Hardware Firewall vs Software Firewall: Differences and Which to Choose

Understand the fundamental differences between hardware and software firewalls. Analyze performance, cost, setup complexity, and security to make the best decision for your network.