Last updated: 2025-07-24
18 It Systems Administration jobs in London.
Caxton Associates
Caxton Associates, founded in 1983, is a global trading and investment firm with offices in New York, London, Monaco, Singapore and Dubai. Caxton Associates’ p…
London
- Skills: Windows Server, Microsoft 365, VMware, Nutanix AHV, Azure, AWS, system maintenance, Active Directory Services, scripting, technical communication
- Level: mid
- Type: full_time
Jane Street
Jane Street is a quantitative trading firm and liquidity provider, focused on technology and intellectual curiosity.
London
- Skills: Linux, System Engineering, Leadership, Project Management, Communication Skills, Partnerships, Analytical Skills, Unix Command Line, Systems Programming, Network Protocols
- Level: mid
- Type: full_time
Kroo Bank
Kroo Bank is a digital banking platform, committed to fostering a diverse and inclusive workplace and supporting a security-focused environment for IT operatio…
London
- Skills: Systems Administrator, macOS, Google Workspace, MDM solutions, security policies, technical issues, Atlassian, Jamf Pro, cloud-based applications, IAM solutions
- Level: mid
- Type: full_time
Kroo
At our cutting-edge fintech company, we know that attracting and retaining the best talent means offering top-notch benefits that help our employees thrive bot…
London
- Skills: Mac systems administrator, macOS, Atlassian (Jira & Confluence), Google Workspace, Mobile Device Management tools, IT infrastructure, security policies and procedures, cloud-based applications, IAM solutions, financial services
- Level: mid
- Type: full_time
DV Trading
Founded more than 15 years ago and headquartered in Chicago, the DV Group of financial services firms has grown to more than 450 people operating throughout No…
London
- Skills: Linux, performance tuning, configuration management, automation, infrastructure-as-code, networking fundamentals, storage systems, system performance analysis, virtualization/VMWare, Agile and DevOps
- Level: mid
- Type: full_time
Cloudflare
At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world's largest networks that powers millions of websites…
London
- Skills: Network Engineering, BGP, OSI model, Scripting, Documentation, Automation, Technical Operation, Network Monitoring, Customer Support, Team Collaboration
- Level: mid
- Type: full_time
Experian
London
- Skills: Systems Administrator, Technology Support, Windows, MacOS, iOS, Android, Microsoft O365, Intune, Azure, Knowledge Base
- Level: mid
- Type: full_time
Schonfeld Strategic Advisors
Schonfeld Strategic Advisors is a global multi-strategy, multi-manager investment platform that harnesses the transformative power of people to perform in all …
London
- Skills: Windows Infrastructure, Citrix VDI, SaaS platforms, Azure Cloud, PowerShell, Microsoft Office 365, Terraform, Network Security, Collaboration, Technical Documentation
- Level: mid
- Type: full_time
Palantir Technologies
London
- Skills: Systems Engineer, infrastructure, business workflows, Palantir Foundry, AIP, operational system, technical leadership, system troubleshooting, system integration, automation
- Level: entry
- Type: full_time
Super Micro Computer
Supermicro® is a Top Tier provider of advanced server, storage, and networking solutions for Data Center, Cloud Computing, Enterprise IT, Hadoop/ Big Data, Hyp…
London
- Skills: server hardware, datacenter, 1st line support, 2nd line support, Windows OS, Linux, system management, HPC, Cloud Computing, customer satisfaction
- Level: mid
- Type: full_time
Take-Two Interactive Software, Inc.
Headquartered in New York City, Take-Two Interactive Software, Inc. is a leading developer, publisher, and marketer of interactive entertainment for consumers …
London
- Skills: IAM, Identity Management, Active Directory, Exchange Server, SAML, OIDC, Email Hygiene, Automation, Scripting, Microsoft Azure
- Level: mid
- Type: full_time
Jane Street
London
- Skills: IT Operations, Windows, Linux, macOS, Active Directory, PowerShell, Bash, networking, system administration, technical support
- Level: mid
- Type: full_time
ExtraHop
ExtraHop is the cybersecurity partner enterprises trust to reveal the unknown and unmask the attack. We’re on a mission to protect and propagate trust by revea…
London
- Skills: NDR, network detection and response, cybersecurity, network infrastructure, virtualization, ticketing system, troubleshooting, JavaScript, Unix/Linux, CompTIA
- Level: mid
- Type: full_time
XTX Markets
XTX Markets is an algorithmic trading firm that actively trades tens of thousands of instruments on over eighty venues with a daily volume of almost three hund…
London
- Skills: datacentre, trading infrastructure, hardware deployment, network cabling, server architecture, PDU planning, inventory tracking, logistics management, collaboration tools, high-pressure environments
- Level: mid
- Type: full_time
Utility Warehouse
We’re a bunch of great people, working together, disrupting the utilities industry. Utility Warehouse is a truly unique FTSE 250 company. Our business model pu…
London
- Skills: Windows, VMware, Active Directory, Terraform, Ansible, Docker, Cloud, Linux, Microsoft DSC, SCCM
- Level: mid
- Type: full_time
Nutanix
London
- Skills: Citrix, EUC, Nutanix, virtualization, cloud-native applications, data center operations, technical architecture, High Availability, Disaster Recovery, Microsoft PowerShell
- Level: mid
- Type: full_time
Take-Two Interactive Software, Inc.
Take-Two Interactive Software, Inc. is a leading developer, publisher, and marketer of interactive entertainment for consumers around the globe. The Company de…
London
- Skills: Systems Administration, Technical Support, Windows OS, MAC OS, Office 365, SCCM, Automation, Network Security, Mobile Device Management, Customer Experience
- Level: mid
- Type: full_time
Shawbrook
Shawbrook is a new type of specialist financial services company, combining the relentless focus on customer service and innovation you would expect from a fin…
London
- Skills: Infrastructure, Microsoft Technologies, Cloud, Wintel, Documentation, VMWare, Powershell, AzureAD, SQL Server, Windows Server
- Level: mid
- Type: full_time
Talan
For more than 20 years, Talan has been advising companies and administrations, supporting them and implementing their transformation projects in the UK and abr…
London
- Skills: Fixed Income, FI trading workflows, Red Hat Enterprise Linux, Linux systems administration, shell scripting, ION trading platform, incident management, troubleshooting, DevOps tools, ITIL
- Level: mid
- Type: full_time
Shawbrook Bank
London
- Skills: Service Desk, Technical Support, Customer Service, ITIL, Incident Management, Troubleshooting, Windows, Networking, Microsoft Office, Troubleshooting Techniques
- Level: mid
- Type: full_time