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

Professional certifications in enterprise Linux, cloud and networking. Select a badge to view the credential.

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