Linux Administrator (f/m/x)

Sii Ukraїna TOV; Łódź; On-site; PLN 100,000 - 160,000; Full time

Job summary

Sii is seeking an experienced Linux Administrator to join an international team focused on maintaining and operating our system environment. You will support API-related tasks and manage container environments such as Kubernetes and Docker, handling incidents and ticket workflows.

The role requires 4+ years of OS administration, strong Linux skills, basic Jenkins knowledge, networking understanding, and fluent Polish with Poland residence. English at B2 level is also required.

Qualifications

• Minimum 4 years of experience in operating system administration.
• Strong Linux skills including command line usage, troubleshooting and maintenance.
• Basic knowledge of Jenkins, pipelines, and monitoring tasks.
• Understanding of networking concepts (SSH, firewalls, proxies, connection analysis).
• Very good command of English - B2 level.
• Fluent Polish language skills and residence in Poland required.

Responsibilities

• Ensure stable operation of the system environment.
• Independent troubleshooting at L1–L2 level and user support.
• Analyze logs and issues related to system and network.
• Operate container environments (Kubernetes, Docker) at the operational level.
• Support API-related tasks, including configuration, small scripts, and adjustments.
• Perform system updates, maintenance, and upkeep.
• Handle incidents and process tickets.

Skills

Linux

CLI usage

Troubleshooting

System maintenance

English language

Polish language

Tools

Docker

Kubernetes

Git

Jenkins

Job description

This translation is generic and may include errors. Translate into Ukrainian.

We are looking for an experienced Linux Administrator to join an international team consisting of members from Germany, Poland, and India. You will be responsible for ensuring the stable operation of our system environment and supporting API-related tasks. The team works in an Agile model, focusing on maintenance, monitoring, and rapid incident resolution.

• Ensuring stable operation of our system environment
• Independent troubleshooting at L1–L2 level and user support
• Analyzing logs and issues related to system and network
• Operating container environments (Kubernetes, Docker) at the operational level
• Supporting API-related tasks, including configuration, small scripts, and minor adjustments
• Performing system updates, maintenance, and upkeep
• Handling incidents and processing tickets

Requirements

• Minimum 4 years of experience in operating system administration
• Strong Linux skills, including command line usage, troubleshooting, and system maintenance
• Basic knowledge of Jenkins, including running pipelines and monitoring tasks
• Understanding of networking concepts (SSH, firewalls, proxy, connection analysis)
• Very good command of English - B2 level
• Fluent Polish language skills and residence in Poland required

Nice to have

• Knowledge of Docker and solid understanding of Kubernetes
• Basic knowledge of Git
• Experience working in corporate environments

Job no. JOB-9HFUY

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.