About

Professional Overview

A focused view of my infrastructure work, proof of work, technical stack and verified credentials. The CV is available here as supporting material, but the site is primarily a knowledge base and engineering journal.

My work sits in the operational layer where systems have to keep running: RHEL, SUSE, Oracle Linux, AIX, lifecycle tooling, HA clustering, virtualisation, Kubernetes platforms, monitoring and automation. I care about clean change windows, repeatable operations, useful observability and troubleshooting that follows evidence instead of assumptions.

Proof of Work

Work Patterns and Technical Evidence

A capability-focused view of the kind of engineering work I do, without exposing private client environments or turning the site into an employment timeline.

Private/internal

Checkmk monitoring plugin development

Custom monitoring scripts and plugins for Linux services, system health and infrastructure-specific operational checks, improving visibility into service state, alert quality and incident response.

Private/internal

Ansible automation workflows

Reusable playbooks, roles/tasks, inventories and validation steps for repeatable Linux administration, patching preparation, health checks and configuration consistency.

Private/internal

Linux lifecycle and patching workflows

Operational workflows for repositories, package state, OS baselines, pre/post-checks, controlled maintenance windows and major upgrade preparation.

Private/internal

HA cluster operations

Cluster health checks, resource placement review, failover behaviour validation, quorum/fencing awareness and service recovery procedures for production HA services.

Private/internal

Kubernetes / Rancher / OKD platform operations

Node lifecycle, RBAC, CNI/CSI, PV/PVC, ingress, namespaces/projects, observability and workload troubleshooting across Kubernetes-style platforms.

Write-up planned

Traefik and reverse proxy service exposure

Service routing, TLS/certificate handling, reverse proxy configuration and controlled exposure patterns for self-hosted and operational services.

Write-up planned

Self-hosted infrastructure / homelab

Hands-on infrastructure practice across Linux, containers, reverse proxying, service monitoring, configuration tracking and practical platform operations.

Private/internal

Git-based infrastructure configuration tracking

Version-controlled Ansible code, Kubernetes manifests, Traefik configurations and operational changes to support reviewability, rollback awareness and repeatability.

Core Technologies

Technical Stack

The main platforms and tooling I use across Linux/Unix operations, lifecycle management, automation, containers, Kubernetes, monitoring and service availability.

OS / Lifecycle

  • RHEL, SUSE, Oracle Linux, AIX
  • Debian, Ubuntu, Arch-based Linux
  • Red Hat Satellite, Foreman, SUSE Manager
  • Provisioning, patching, major upgrades
  • Repositories, baselines, compliance workflows
  • LVM, filesystems, systemd, boot troubleshooting
  • Controlled maintenance windows and production support

Automation / Containers

  • Ansible, Ansible Runner, Python, shell scripting
  • Playbook development, reusable roles/tasks, inventories, collections
  • Health checks, reporting, validation scripts
  • Pre/post-patching automation and operational checks
  • Docker, Podman, Docker Compose, Dockerfiles
  • Portainer, LXC, container networking and volumes
  • Git repositories for Ansible code and configuration tracking

Kubernetes Platforms

  • Kubernetes, OKD, Rancher, K3s
  • Node lifecycle, namespaces/projects, RBAC
  • CNI/CSI, PV/PVC and storage/network integration
  • Ingress exposure, service routing and workload deployment
  • Kubernetes manifests and Git-based version control
  • Observability, certificate/configuration handling
  • Platform and workload troubleshooting

Service Operations / HA

  • Pacemaker, Corosync, CRM/pcs
  • SAP HANA, SAP application services and SFTP HA services
  • Cluster resources, failover behaviour, quorum/fencing awareness
  • Apache HTTPD, Nginx, HAProxy, Traefik
  • Reverse proxying, load-balancing concepts, TLS/certificates
  • Checkmk, Zabbix, Nagios, custom monitoring plugins/scripts
  • ITSM ticketing workflows and incident follow-up

Certifications

Verified Credentials

Verified credentials are shown as accessible text, with Credly badges loaded as an optional visual layer.

Red Hat Certified System Administrator (RHCSA)

Red Hat

AWS Certified Cloud Practitioner

Amazon Web Services

CCNA: Switching, Routing, and Wireless Essentials

Cisco

CCNA: Enterprise Networking, Security, and Automation

Cisco

Red Hat Enterprise Linux: Seller

Red Hat

Red Hat Portfolio: Foundational

Red Hat

Contact

Let’s Talk Infrastructure

For Linux/Unix systems administration, enterprise infrastructure operations, HA platforms, automation, Kubernetes operations or production troubleshooting, the best way to reach me is email or LinkedIn.

Email contact.me@fabiofurtado.com LinkedIn linkedin.com/in/fabio-caldeira-furtado
Location Lisbon, Portugal
CV Download PDF