Jobs Companies OnHires Senior System Administrator (part-time)

About this Senior System Administrator (part-time) role at OnHires

OnHires · Remote · Europe (remote)

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.

Ready to apply to OnHires?
Apply to OnHires

Similar jobs

Unisys
Principal UNIX/Linux System Administrator - Business Availability & Disaster Recovery
Unisys
⚡ Apply early USA CT Remote · location restricted
● New 👁 Seen ✓ Applied 2h ago
Unisys
Principal Windows System Administrator - Business Availability & Disaster Recovery
Unisys
⚡ Apply early USA CT Remote · location restricted
● New 👁 Seen ✓ Applied 2h ago
Vast
Senior IT System Administrator
Vast
⚡ Apply early Long Beach, California, United... Onsite $123,000–$180,000
● New 👁 Seen ✓ Applied 3h ago
Vast
Senior Linux Systems Administrator
Vast
⚡ Apply early Long Beach, California, United... Onsite $123,000–$174,600
● New 👁 Seen ✓ Applied 3h ago
ME
Senior Project Management Specialist/ System Administrator
Medtronic
⚡ Apply early Mounds View, Minnesota, United... Onsite $118,400–$177,600
● New 👁 Seen ✓ Applied 3h ago
Apex Ai
IT Administrator - (Senior) IT Administrator
Apex Ai
⚡ Apply early Munich Onsite
● New 👁 Seen ✓ Applied 6h ago
Hadrian Automation
Systems Administrator, AV
Hadrian Automation
⚡ Apply early Los Angeles, CA Onsite $121,000–$145,000
● New 👁 Seen ✓ Applied 9h ago
Hadrian Automation
Systems Administrator
Hadrian Automation
⚡ Apply early Mesa, AZ Onsite $91,000–$109,000
● New 👁 Seen ✓ Applied 9h ago
Acquird.io
Senior IT Systems Administrator
Acquird.io
⚡ Apply early Toronto Onsite CA$90,000–CA$110,000
● New 👁 Seen ✓ Applied 10h ago

Sign up for suggestions tailored to the jobs you open and the searches you save.

More jobs at OnHires

See all jobs at OnHires →

Apply now
🤖

Whoa — hold up

JobsRadar was built for real people having a rough time in their job search — not for automated requests. You're clicking way too fast and you're now temporarily blocked.

Come back later. If you're genuinely job hunting, we've got your back — just act like a human.

Catch your next role the second it’s posted.

Create a free account and we’ll watch the boards for you — the instant a job matches your search, it lands in your inbox or Telegram. No digging, no refreshing.

Create free account

Free forever · takes 30 seconds · already have one?

Get an edge on your job hunt.

Join our Telegram channel for the stuff that helps you land the role — salary benchmarks, the weekly market pulse, and new-feature drops. No spam, just signal.

Join the channel — it's free