[Hiring] Senior System Administrator @OnHires

Role Description

The company provides VPS and dedicated server hosting for FX brokers and traders. We are looking for a reliable, hands-on Senior Systems Administrator who can support customer-facing infrastructure and contribute to technical improvement projects. This is a long-term part-time role for someone comfortable working independently with production systems, customer issues, and business-critical infrastructure.

Responsibilities

• Administer and troubleshoot Windows and Linux servers.
• Support Microsoft Hyper-V and VMware environments.
• Diagnose issues with Dell and Supermicro servers.
• Resolve customer incidents involving VPS, dedicated servers, virtualisation, and connectivity.
• Maintain Active Directory, DNS, Group Policy, backups, and monitoring.
• Support data centre infrastructure, storage, and networking.
• Participate in upgrades, migrations, and infrastructure improvement projects.
• Maintain clear technical documentation and follow change-management procedures.

Qualifications

• 7+ years of systems, infrastructure, or data-centre experience.
• Strong hands-on experience with:
  • Windows Server and Linux;
  • Hyper-V and VMware;
  • Dell and/or Supermicro servers;
  • Server and virtualisation troubleshooting.
• Experience in data centres, hosting, managed services, or another 24/7 infrastructure environment.
• Good understanding of networking, storage, backup, and disaster recovery.
• Strong spoken and written English.
• Reliable, organised, and comfortable taking ownership of issues through resolution.

Nice to have

• VPS, dedicated hosting, or IaaS experience.
• iDRAC, IPMI, SAN/NAS or Veeam.
• PowerShell, Bash, Python, or Ansible.
• Experience in fintech, trading, telecom, broadcast, or other mission-critical environments.

Engagement

• Independent contractor.
• Approximately 10–15 hours per week.
• Remote, primarily during European business hours.
• Rotating on-call coverage by agreement.