Senior Infrastructure Administrator (f/m/x)

Sii Poland; Kraków; Hybrid; PLN 120,000 - 150,000; Full time

Benefits offered by this job

Great Place to Work

Medical care

Profit sharing

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Regular integration events and trips

Job summary

Sii Poland is seeking an experienced Infrastructure Administrator to support a cloud transformation. The role focuses on on-premises and cloud infrastructure, with emphasis on Microsoft Azure, VMware, and hybrid environments.

You will design, implement, and migrate infrastructure while supporting daily IT operations. Ideal candidates have 5+ years in enterprise IT, strong Windows/Linux administration, and experience with Azure/AWS.

Qualifications

• 5+ years of experience in IT infrastructure within enterprise environments.
• Expert knowledge of VMware virtualization platforms and experience in designing, implementing, and maintaining complex on-premises environments.
• Strong knowledge of Windows Server and Linux system administration.
• Practical experience with Microsoft Azure and AWS, as well as building and maintaining hybrid environments.
• Planning and executing infrastructure migrations from on-premises to the cloud, especially Microsoft Azure.
• Good knowledge of network infrastructure and IAM, DNS, and DHCP services in corporate environments.
• Experience in storage solutions administration (SAN, NAS, backup & recovery) and automation using PowerShell.
• English language proficiency at a minimum B2 level.

Responsibilities

• Supporting and managing IT infrastructure in on-premises and cloud environments.
• Managing Windows and Linux operating systems and server administration.
• Designing, implementing, and troubleshooting complex on-premises environments.
• Managing network infrastructure, including routing, switching, DNS, and DHCP.
• Planning and executing migrations from on-premises environments to Microsoft Azure.
• Managing virtualization systems such as VMware and Hyper-V.
• Automating processes using PowerShell and scripting.
• Supporting project delivery and daily IT operations.

Skills

VMware

Windows Server

Linux

Azure

AWS

PowerShell

Networking

Backup & recovery

Tools

VMware vSphere

Hyper-V

Windows Server

Linux

Job description

We are looking for an experienced Infrastructure Administrator to join the project and support the cloud transformation. The ideal candidate has strong skills in both on-premises infrastructure and cloud solutions, with a particular focus on Microsoft Azure. This role is for someone comfortable working in hybrid environments, capable of designing and implementing infrastructure solutions, and participating in cloud migrations. You will collaborate on transformation projects, support operational activities, and help resolve complex technical issues.

Your tasks

• Supporting and managing IT infrastructure in on-premises and cloud environments
• Managing Windows and Linux operating systems and server administration
• Designing, implementing, and troubleshooting complex on-premises environments
• Managing network infrastructure, including routing, switching, DNS, and DHCP
• Planning and executing migrations from on-premises environments to Microsoft Azure
• Managing virtualization systems such as VMware and Hyper-V
• Automating processes using PowerShell and scripting
• Supporting project delivery and daily IT operations

Requirements

• Minimum 5 years of experience in IT infrastructure within enterprise environments
• Expert knowledge of VMware virtualization platforms and experience in designing, implementing, and maintaining complex on-premises environments
• Strong knowledge of Windows Server and Linux system administration
• Practical experience with Microsoft Azure and AWS, as well as building and maintaining hybrid environments
• Previous work in planning and executing infrastructure migrations from on-premises to the cloud, especially Microsoft Azure
• Good knowledge of network infrastructure and IAM, DNS, and DHCP services in corporate environments
• Experience in storage solutions administration (SAN, NAS, backup & recovery) and automation using PowerShell
• English language proficiency at a minimum B2 level

Nice to have

• Experience in project management

Job no. JOB-CHHQV

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Benefits For You

• Great Place to Work
• Solid financial situation
• Contracts with the biggest brands
• Centre of internal trainings
• Many experts you can learn from
• Open and accessible management team
• Profit sharing
• Passion Sponsorship program
• Regular integration events and trips
• Comfortable and well-equipped offices
• MySii app
• Medical care