Senior System Administrator

Onhires

Malta +26 more

RemoteCareer-pivot friendly

Who this role is best for

Strong fit for experienced systems administrators who manage mission-critical infrastructure and support remote, part-time roles in Europe.

Best fit for

Candidates with 7+ years in data centres and proven customer support expertise in infrastructure operations
— “7+ years of systems, infrastructure, or data-centre experience”
Professionals comfortable with hybrid virtualization environments (Windows/Linux + Hyper-V/VMware)
— “Administer and troubleshoot Windows and Linux servers. Support Microsoft Hyper-V and VMware environments”
Individuals with on-call readiness and ability to resolve complex server issues independently
— “Reliable, organised, and comfortable taking ownership of issues through resolution”

Things to consider

Part-time hours require balancing availability with other commitments during European business hours
— “approximately 10–15 hours per week, with availability during 10:00–18:00 CET as needed”
On-call rotation implies potential for unscheduled work outside standard hours
— “Rotating on-call coverage by agreement”

How to stand out

Highlight specific experience with Dell/Supermicro server diagnostics in resume and interviews
— “Diagnose issues with Dell and Supermicro servers”
Demonstrate track record of maintaining technical documentation and following change-management procedures
— “Maintain clear technical documentation and follow change-management procedures”
Quantify impact of infrastructure improvements in past roles to align with project contribution expectations
— “Participate in upgrades, migrations, and infrastructure improvement projects”
Showcase English communication skills with examples of resolving customer incidents
— “Strong spoken and written English. Resolve customer incidents involving VPS, dedicated servers...”

Pace · SteadyCollaboration · MediumAutonomy · MediumDecision Impact · TeamLevel · Senior

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

resolved customer incidents
maintained infrastructure
participated in upgrades

Typical background

systems administrationdata centre experience

Skills & requirements

Required

Server AdministrationTroubleshootingCustomer SupportData Centre InfrastructureChange Management

Preferred

VPS HostingSan/nasAnsible

About the role

Original posting from Onhires via Ashby

About the role
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.
Requirements
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.
Strong customer-facing experience in technical support or infrastructure operations, with the ability to troubleshoot issues and communicate clearly with both technical and non-technical users.
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.
Working hours & availability
The role requires approximately 10–15 hours per week, with availability during 10:00–18:00 CET as needed. The schedule is flexible, but the ability to respond and support the team within these hours is important.
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.

Source: Onhires careers (Ashby)