
André Cardoso
Linux Sysadmin · DevOps
Profile
Systems administrator with around 5 years of experience across IT support, Linux and Windows servers and infrastructure monitoring, now moving into DevOps. I currently look after the network, servers and backups of an organisation with more than 800 employees. Outside work I run my own production VPS with Docker, nginx, Cloudflare and Wazuh, hosting several apps I built myself, and I automate business processes with Python, PowerShell and OpenRPA.
Technical skills
- Containers & deployment
- Docker, Docker Compose, nginx (reverse proxy), Jenkins, Git, GitHub
- Networking & web
- Cloudflare DNS, Let's Encrypt / TLS, DHCP, Active Directory, secure remote access
- Monitoring & security
- Zabbix, Grafana, Prometheus, Wazuh (SIEM), Fail2Ban, Dozzle, server hardening
- Systems
- Linux (Debian, Mint), Windows Server, backups
- Scripting & automation
- Bash, Python, PowerShell, OpenRPA (SAP)
- Development
- React, Node.js, Express, REST APIs
Experience
IT Support Technician L2 · Thai Union (ESIP)
Jan 2025 – Present
- Maintain the network, servers and backups for an organisation of 800+ employees.
- Automate recurring tasks with PowerShell and Python.
- Developing an OpenRPA robot that creates SAP purchase requisitions and purchase orders from another system's API, removing manual data entry.
Helpdesk L2 / Junior SysAdmin · JanelaDigital
2022 – 2024
- Introduced infrastructure monitoring with Grafana and Prometheus.
- Managed Linux and Windows servers and Docker deployments.
- Supported DHCP, Active Directory and user systems.
IT Helpdesk Technician L1 · Createinfor
2021 – 2022
- Provided remote and on-site technical support.
- Configured systems, maintained hardware and resolved email issues.
Projects
- Caderneta – Multi-user web app in production that reads screenshots with OCR and turns them into stats. React, Docker, nginx, Cloudflare; deployment moving to Jenkins.
- VPS security monitoring – Wazuh SIEM, firewall and Dozzle on an internet-facing server, with real-time alerts on login attempts and scans.
- Vivace Beauty – Client landing page for a salon in Peniche: React + C#, own .pt domain, nginx in Docker, one-command deploy script.
- Horas – Self-hosted time-clock app in Docker behind nginx with HTTPS.
- andrecardoso.dev – Pre-rendered React site and Node API with Docker Compose, nginx and Let's Encrypt, with technical articles.
Education & learning
- Technical Course in Computer Systems and Networks · 2020
- Currently learning: AWS, cloud security and CI/CD automation
- Studying towards the CISSP certification
Languages
- Portuguese – Native
- English – Fluent
- German – B2
Interests
Cybersecurity, monitoring, automation, self-hosting and Raspberry Pi.