Senior Linux Administrator | Kubernetes & API Ops

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

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.