Senior System Administrator

About the role

We are looking for an experienced Senior System Administrator to join our infrastructure team. You will be responsible for managing and optimizing the company’s core systems, ensuring high availability, security, and performance across our Linux‑based environment.

Key responsibilities

• Install, configure, and maintain operating system software on servers.
• Design and implement networking structures, including IPSEC tunnels.
• Develop and maintain backup policies and disaster‑recovery solutions.
• Monitor system health using tools such as Nagios, Zabbix or PRTG and resolve incidents.
• Automate routine tasks with shell or Python scripts.
• Tune VMware vSphere and Java‑based applications for optimal performance.
• Configure and troubleshoot NGINX web servers.

Required profile

• Proven experience with Linux (CentOS, Red Hat) operating systems.
• Strong background in networking concepts and IPSEC tunnel setup.
• Hands‑on experience with virtualization (VMware vSphere).
• Solid understanding of Java‑based application runtime tuning.
• Excellent problem‑solving and communication skills.

Required skills

• Linux (CentOS, Red Hat)
• Shell scripting / Python
• VMware vSphere
• NGINX
• Network design and IPSEC
• Java application tuning
• Nagios, Zabbix, PRTG
• Backup tools and methodologies
• DDoS protection services (Cloudflare, Nexusguard, Imperva)
• Public cloud platforms (AWS, IBM Cloud)

What we offer

• Flexible working hours
• Opportunity to work with cutting‑edge infrastructure technologies
• Collaborative and supportive team environment