Senior Unix System Administrator

Vertex Agility; Kraków; On-site; PLN 180,000 - 260,000; Full time

Job summary

Vertex Agility is seeking an experienced Unix Systems Administrator to support Linux server environments and DevOps infrastructure. You will collaborate with development, infrastructure, and engineering teams to deliver reliable services and automate routine tasks.

Key focus areas include incident management, capacity planning, and adherence to security and operational best practices across production and non-production environments.

Qualifications

• Experience with Linux/Unix administration, including RHEL
• Strong scripting skills (Shell, Perl, or Python)
• Networking knowledge (TCP/IP, UDP, LAN/WAN)
• Understanding of ITIL principles and service operations
• Incident management and change management experience
• Ability to automate tasks and improve operations

Responsibilities

• Configure, deliver, and support Linux/Unix server environments and infrastructure services.
• Collaborate with development and DevOps teams to deploy and consume central infrastructure services.
• Provide technical guidance on Unix/Linux architecture and best practices.
• Develop and maintain scripts to automate routine tasks and reduce manual work.
• Maintain capacity monitoring, incident resolution, and preventive measures.
• Document infrastructure standards and operational procedures.

Job description

We are looking for an experienced Unix Systems Administrator to join a global infrastructure team supporting Linux server environments and DevOps infrastructure delivery. The role involves configuring, implementing, maintaining, and troubleshooting Linux-based systems across production and non-production environments.

You will collaborate with application development teams, infrastructure specialists, and engineering teams to deliver reliable, secure, and efficient infrastructure services. A key focus will be on automation, service improvement, incident resolution, and maintaining high standards of operational excellence.

Key Responsibilities

• Configure, deliver, and support Linux/Unix server environments and infrastructure services.
• Implement new technologies and provide ongoing support for hardware and software solutions across production and non-production environments.
• Work with application development and DevOps teams to deploy and consume centrally provided infrastructure services.
• Provide technical support while ensuring compliance with internal policies, security standards, and operational best practices.
• Develop and maintain Linux/Unix scripts to automate operational activities and reduce repetitive manual tasks.
• Identify opportunities to improve service delivery, operational efficiency, and automation capabilities.
• Provide technical guidance on Unix/Linux architecture, design, and best practices throughout the infrastructure lifecycle.
• Maintain capacity management standards, monitor infrastructure utilization, and identify potential capacity issues.
• Assess, analyse, document, and implement infrastructure changes based on technical and business requirements.
• Troubleshoot incidents, perform root cause analysis, and implement preventive measures to reduce recurring issues.
• Collaborate with application, infrastructure, engineering, and support teams to deliver effective technical solutions.
• Maintain technical documentation, operational procedures, and infrastructure standards.
• Support service improvement initiatives and contribute to the achievement of agreed service-level objectives.

Essential Technical Skills and Experience

• Linux Administration: 6-10 years of experience in Linux/Unix administration, with strong expertise in Red Hat Enterprise Linux (RHEL).
• Veritas Technologies: Knowledge of and troubleshooting experience with Veritas Volume Manager (VxVM) and Veritas Cluster Server (VCS).
• Storage Infrastructure: Experience configuring filesystems on NAS storage and EMC SAN solutions, including standalone and clustered environments and storage replication.
• Linux Architecture: Strong understanding of volume managers, multipathing, kernel parameter tuning, and Linux system architecture.
• Scripting and Automation: Experience with shell scripting and/or Perl or Python for automating operational tasks.
• Infrastructure Platforms: Experience with IBM and HP x86 hardware and virtualization technologies such as VMware, Citrix, or Hyper-V.
• Networking: Knowledge of network infrastructure and protocols, including TCP/IP, UDP, LAN/WAN, load balancing, firewalls, virtual IPs, and related technologies.
• Configuration Management: Experience with DevOps and configuration management tools such as Ansible, Puppet, or Chef.
• Enterprise Environments: Experience supporting large-scale enterprise infrastructure, preferably within a regulated industry such as financial services.
• Operational Support: Experience with incident management, root cause analysis, change management, and service operations.

Desirable Skills and Experience

• Experience with SLES and Solaris, including x86 and SPARC platforms.
• Knowledge of ITIL principles and IT service management practices.
• Experience working in Agile environments.
• Familiarity with infrastructure design patterns, security standards, and operational best practices.
• Experience supporting middleware technologies such as WebSphere, Apache HTTP Server, Tomcat, IIS, and MQ.
• Knowledge of databases such as Oracle, Oracle RAC, Microsoft SQL Server, Sybase, or DB2.
• Experience designing and supporting infrastructure solutions across multiple technology layers.
• Strong analytical and troubleshooting skills, with a proactive approach to identifying and resolving technical issues.
• Excellent written and verbal communication skills, including the ability to explain complex technical concepts clearly.
• A collaborative, team-oriented mindset and the ability to work effectively with globally distributed teams.
• Ability to work independently, manage priorities, and deliver results under pressure.
• Strong customer-service orientation and commitment to delivering reliable infrastructure services.
• A continuous-improvement mindset, with a focus on automation, efficiency, and service quality.
• Sound decision-making skills and the ability to take ownership of technical issues and outcomes.
• Understanding of IT governance, compliance requirements, and operational procedures.
• Willingness to support scheduled weekend work and participate in an on-call rotation.