System Administrator

act digital; Lisboa; Hybrid; EUR 45,000 - 65,000; Full time

Job summary

act digital is seeking an experienced System Administrator to join an international technology environment. You will work on highly available platforms, spanning cloud, virtualization, and infrastructure design, with a focus on operational excellence and enterprise reliability.

The role offers a flexible hybrid model with 2 days in the Restelo office and on-call rotation to support critical services. Collaboration with development and business teams is essential.

Qualifications

• 5+ years of experience as an Infrastructure Engineer or System Administrator.
• Strong experience with Windows Server, IIS, AD, AWS, Azure, VMware/Hyper-V.
• Infrastructure monitoring and troubleshooting.
• Security principles (CIS/NIST).
• ITIL practices.

Responsibilities

• Design, implement, and manage infrastructure platforms supporting business needs.
• Translate requirements into scalable, secure solutions.
• Resolve complex infrastructure incidents and provide advanced support.
• Work with development and business teams to align with application needs.
• Participate in infrastructure projects from planning through implementation.
• Maintain documentation and knowledge sharing.
• Engage with stakeholders on infrastructure topics.
• Contribute to continuous improvement and operational excellence.
• Support service availability and performance through monitoring and troubleshooting.

Skills

Windows Server

IIS

Active Directory

AWS

Azure

VMware/Hyper-V

Monitoring

Security principles

CIS/NIST

ITIL

PowerShell

Python

Stakeholder mgmt

Tools

PowerShell

Python

Job description

We are looking for an experienced System Administrator to join a growing international technology environment, working on highly available and business-critical platforms. This role offers the opportunity to work across cloud, virtualization, systems administration, infrastructure design, and operational support while contributing to the continuous improvement of enterprise infrastructure services.

Flexible Hybrid model: 2 days per week in the office in Restelo

On-call rotation required

Key Responsibilities

• Design, implement, and manage infrastructure platforms supporting business and application needs.
• Translate architectural requirements into scalable and secure technical solutions.
• Resolve complex infrastructure incidents and provide advanced support.
• Work closely with development and business teams to ensure infrastructure aligns with application requirements.
• Participate in infrastructure projects from planning through implementation.
• Maintain technical documentation and support knowledge-sharing initiatives.
• Engage with internal and external stakeholders on infrastructure-related topics.
• Contribute to continuous improvement, operational excellence, and infrastructure stability.
• Support service availability and performance through proactive monitoring and troubleshooting.

Required Skills & Experience

• 5+ years of experience as an Infrastructure Engineer or System Administrator.
• Strong experience with: Microsoft Windows Server, IIS, Active Directory, AWS, Microsoft Azure, VMware and/or Hyper-V
• Infrastructure monitoring and troubleshooting
• Good understanding of infrastructure and network security principles.
• Familiarity with CIS and NIST security frameworks.
• Knowledge of ITIL practices.
• Experience with automation and scripting using PowerShell and/or Python is highly valued.
• Ability to work effectively with both technical and non-technical stakeholders.

If you are passionate about cloud technologies, infrastructure operations, automation, and delivering reliable enterprise solutions, we would love to hear from you.