Last updated: 2025-06-06

40 It Systems Administration jobs in London.

Hiring now: Windows System Engineer @ Caxton Ass, Database Engineer @ Cloudflare, Linux Engineer @ Jane Stree, Systems Administrator @ Kroo Bank, Systems Administrator @ Kroo, Linux Engineer @ Dv Trading, Aihpc Systems Production Engineer @ Meta, Lead Systems Engineer @ Taketwo In, Systems Infrastructure Team Member @ Quadrature, Systems Engineer @ Alphagrep . Explore more at at jobswithgpt.com

🔥 Skills

Linux (13) Active Directory (8) automation (7) Automation (7) Azure (6) AWS (5) Windows Server (4) Troubleshooting (4) PowerShell (4) networking (4)

📍 Locations

London (34) Bracknell (2) Crawley (2)

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…

Windows System Engineer

London

  • Skills: Windows Server, Microsoft 365, VMware, Nutanix AHV, Azure, AWS, system maintenance, Active Directory Services, scripting, technical communication
  • Experience: 5-10 years of applied experience as a Windows Systems Engineer

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…

Database Engineer

London

  • Skills: PostgreSQL, database tooling, automation, monitoring, performance tuning, high availability, backup, disaster recovery, scripting languages, infrastructure-as-code
  • Experience: Experience building large multi-tenant databases, operating, capacity planning, and designing for failover, fault tolerance, and disaster recovery.
  • Type: Full-time

Jane Street

Jane Street is a quantitative trading firm and global liquidity provider, utilizing technology and quantitative methods to make its trading decisions and opera…

Linux Engineer

London

  • Skills: Linux, Systems Engineering, Configuration Management, Automation, Production Issues, Troubleshooting, Networking, Unix Command Line, Programming Concepts, Root-Cause Analysis
  • Experience: Experience managing/troubleshooting Linux systems in a home, work, or school environment; exposure to Linux environments through either software development, IT operations, or a similar field.
  • 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…

Systems Administrator

London

  • Skills: Systems Administrator, macOS, Google Workspace, MDM solutions, security policies, technical issues, Atlassian, Jamf Pro, cloud-based applications, IAM solutions
  • Experience: Experience working in a Mac system administrator role
  • Type: Hybrid

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…

Systems Administrator

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
  • Experience: Experience working in a Mac system administrator role
  • Type: Hybrid Working

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…

Linux Engineer

London

  • Skills: Linux, performance tuning, configuration management, automation, infrastructure-as-code, networking fundamentals, storage systems, system performance analysis, virtualization/VMWare, Agile and DevOps
  • Experience: 5+ years of experience in Linux engineering, debugging, administration, and OS system provisioning (PXE/DHCP/TFTP/Grub)
  • Type: Full-time

Meta

Meta builds technologies that help people connect, find communities, and grow businesses. When Facebook launched in 2004, it changed the way people connect. Ap…

AI/HPC Systems Production Engineer

London

  • Skills: AI, HPC, Systems Production Engineer, network infrastructure, training accelerators, performance, reliability, monitoring, troubleshooting, CI/CD
  • Experience: 4+ years work experience.
  • 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…

Network Engineer

London

  • Skills: Network Engineering, BGP, OSI model, Scripting, Documentation, Automation, Technical Operation, Network Monitoring, Customer Support, Team Collaboration
  • Experience: Proficient in multiple network vendor operating systems, Associate level network certification(s) (JNCIA, CCNA, etc) or higher

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 …

Lead Systems Engineer

London

  • Skills: IAM, Active Directory, Exchange, systems engineering, identity management, authentication, automation, SSO, email security, Windows Server
  • Experience: 3+ years of experience designing, implementing, and optimising IAM; 7+ years of experience in systems engineering, infrastructure, or a related technical domain.
  • Type: Hybrid

quadraturecapital

Systems Infrastructure Team Member

London

  • Skills: Linux, C++, Python, grid computing, Infrastructure, Systems Operations, Systems Engineering, Information Security, Network Engineering, Automated Trading System

AlphaGrep Securities

AlphaGrep is a quantitative trading and investment firm founded in 2010. We are one of the largest firms by trading volume on Indian exchanges and have signifi…

Systems Engineer

London

  • Skills: Linux Infrastructure, Distributed File System, Job Scheduling, Security solutions, Automation, Network connectivity, Git, CI/CD, MySQL, Configuration management

Five Rings LLC

Five Rings is a proprietary trading firm founded with a vision of combining strategy, innovation and technology to succeed in today’s global markets. With offi…

Experienced/Lateral - Linux Systems Administrator

London

  • Skills: Linux administration, Debian, Ubuntu, BIND, Ansible, Linux KVM, Zabbix, Google workplace, scripting, cybersecurity

CoreWeave

CoreWeave is the AI Hyperscaler™, delivering a cloud platform of cutting edge services powering the next wave of AI. Our technology provides enterprises and le…

Operations Engineer

London

  • Skills: operations, supercomputing, troubleshoot, Linux, Kubernetes, HPC, data center, networking, documentation, provisioning
  • Experience: 2 or more years of experience troubleshooting or administering data center or on-prem infrastructure
  • Type: Full-time
  • Salary: £40,000 to £55,000

Perforce Software, Inc.

Perforce is a community of collaborative experts, problem solvers, and possibility seekers who believe work should be both challenging and fun. We inspire crea…

IT Systems Engineer

Bracknell

  • Skills: IT operations, infrastructure, cloud, IaaS, VMware, Windows, Linux, Terraform, Puppet, Agile
  • Experience: Minimum 3 years in IT operations, Minimum 3 years of multi-site enterprise experience and continuous availability, Minimum 3 years Operational experience
  • Type: Full-time

BigID

BigID is an innovative tech startup that focuses on solutions for data security, compliance, privacy, and AI data management. We're leading the market in all t…

Technical Support Engineer

London

  • Skills: Technical Support, Customer Advocacy, Troubleshooting, Linux, Implementation, Configuration, SQL, Docker, Kubernetes, Cybersecurity
  • Experience: 2+ years of professional experience in information technology in a customer-facing role – preferably involved in product implementation and hands-on technical activities within enterprise corporate environments

CoreWeave

CoreWeave is the AI Hyperscaler™, delivering a cloud platform of cutting edge services powering the next wave of AI. Our technology provides enterprises and le…

Data Centre Technician

Crawley

  • Skills: Data Centre, hardware diagnostics, network diagnostics, Linux, scripting languages, Cisco IOS, Juniper JunOS, on-call rotation, troubleshooting, inventory management
  • Experience: At least five years Data Centre experience
  • Type: Full-time
  • Salary: £45,000 to £53,000

Experian

Senior Systems Administrator

London

  • Skills: Systems Administrator, Technology Support, Windows, MacOS, iOS, Android, Microsoft O365, Intune, Azure, Knowledge Base

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 …

Senior WinOps Engineer

London

  • Skills: Windows Infrastructure, Citrix VDI, SaaS platforms, Azure Cloud, PowerShell, Microsoft Office 365, Terraform, Network Security, Collaboration, Technical Documentation

Rimes Technologies

Rimes provides enterprise data management solutions to the global investment community, helping clients make better investment decisions using accurate informa…

Senior Infrastructure Engineer

London

  • Skills: Infrastructure engineer, VMWare, Windows Server, Databricks, Azure, SQL Server, monitoring tools, datacenter, SaaS, capacity planning
  • Experience: Experience of supporting physical Datacenters, Hardware, O/S and networks
  • Type: Full-time

Hawk-Eye Innovations

3rd Line Support Engineer

London

  • Skills: support, IT systems, networking, security, Azure, firewall, cloud, IT infrastructure, troubleshoot, virtual
  • Type: Full-time
  • Salary: £37,000 per annum

Luxoft

Luxoft is a provider of technology and business processing services to hedge funds and asset managers, offering trading and risk management platforms, along wi…

Networks Engineer

London

  • Skills: Network Troubleshooting, Network Maintenance, Security Protocols, Firewall Rules, Security Threats, Compliance Assessments, Network Optimization, Performance Tuning, Documentation, Client Collaboration

Rentokil Initial

Linux Administrator

Crawley

  • Skills: Linux solutions, Automation, Red Hat Enterprise Linux, Ansible Automation, scaling, supporting, performance metrics, project planning, troubleshooting, Scripting
  • Type: Full-time

Capstone Investment Advisors

A global, alternative investment management firm operating across a broad range of derivatives-based strategies.

Infrastructure Engineer

London

  • Skills: technology, infrastructure, security, cloud, automation, networking, virtualization, backup, disaster recovery, monitoring
  • Experience: 7 or more years in the financial sector, with related technical skills

Palantir Technologies

Systems Engineer

London

  • Skills: Systems Engineer, infrastructure, business workflows, Palantir Foundry, AIP, operational system, technical leadership, system troubleshooting, system integration, automation
  • Experience: At least 1 year of experience administering an HR, Finance, or Sales system
  • Type: Full-time
  • Salary: $95,000 - $142,000/year

PlayStation

PlayStation isn’t just the Best Place to Play — it’s also the Best Place to Work. Today, we’re recognized as a global leader in entertainment producing The Pla…

IT Network Infrastructure Engineer

London

  • Skills: network infrastructure, enterprise networking, TCP/IP, ETNERNET, VLANs, firewall, BGP, OSPF, AWS, Azure
  • Type: full_time
  • Salary: {'min': None, 'max': None, 'period': '', 'currency': ''}

NIQ

NIQ is the world’s leading consumer intelligence company, delivering the most complete understanding of consumer buying behavior and revealing new pathways to …

Senior Network Engineer

London

  • Skills: Cisco, network protocols, Ansible, network performance, capacity planning, Infrastructure as Code, network automation, ITIL, network asset management, Wireless
  • Type: full_time
  • Salary: {'min': None, 'max': None, 'period': '', 'currency': ''}

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…

Service Engineer

London

  • Skills: server hardware, datacenter, 1st line support, 2nd line support, Windows OS, Linux, system management, HPC, Cloud Computing, customer satisfaction
  • Type: full_time
  • Salary: {'min': None, 'max': None, 'period': '', 'currency': ''}

Splunk

Splunk turns machine data into answers. Organizations use market-leading Splunk solutions with machine learning to solve their toughest IT, Internet of Things …

Senior Technical Support Engineer

London

  • Skills: UNIX, AWS, Azure, Technical Support, Relational Databases, Python, JSON, Cloud Level Support, Customer Issues, Troubleshooting
  • Type: other
  • Salary: {'min': None, 'max': None, 'period': '', 'currency': ''}

Utility Warehouse

Hello, we're UW. We’re a bunch of great people, working together, disrupting the utilities industry. Utility Warehouse is a truly unique FTSE 250 company. Our …

Infrastructure Engineer

London

  • Skills: Infrastructure, Windows, VMware, Automation, Active Directory, Cloud, Terraform, Ansible, Linux, Virtualization
  • Type: full_time
  • Salary: {'min': None, 'max': None, 'period': '', 'currency': ''}

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…

Network Engineer

London

  • Skills: network engineering, automation, BGP, anycast routing, MPLS, Segment Routing, network architecture, latency optimization, network monitoring, documentation
  • Type: full_time
  • Salary: {'min': None, 'max': None, 'period': '', 'currency': ''}

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 …

Lead Systems Engineer

London

  • Skills: IAM, Identity Management, Active Directory, Exchange Server, SAML, OIDC, Email Hygiene, Automation, Scripting, Microsoft Azure
  • Type: full_time
  • Salary: {'min': None, 'max': None, 'period': '', 'currency': ''}

Perforce Software, Inc.

Perforce is a community of collaborative experts, problem solvers, and possibility seekers who believe work should be both challenging and fun. With a global f…

Senior Technical Support Engineer

Bracknell

  • Skills: Technical Support, LAMP Stack, Linux, AWS, HTTP Protocol, Apache, Nginx, RDBMS, PHP, REST API
  • Type: full_time
  • Salary: {'min': None, 'max': None, 'period': '', 'currency': ''}

Jane Street

IT Operations Engineer

London

  • Skills: IT Operations, Windows, Linux, macOS, Active Directory, PowerShell, Bash, networking, system administration, technical support
  • Salary: {'min': None, 'max': None, 'period': '', 'currency': ''}

Smartsheet

Smartsheet is a tech company with a human story to tell. We’re here to empower teams to manage projects, automate workflows, and rapidly build new secure solut…

Desktop Systems Specialist

London

  • Skills: Desktop Support, IT Infrastructure, Active Directory, Service Desk, Technical Support, No-Code Solutions, ITIL, A/V Systems, Hardware Troubleshooting, Google Gsuite
  • Type: full_time
  • Salary: {'min': None, 'max': None, 'period': '', 'currency': ''}

Optimove

Optimove is a global marketing tech company, recognized as a Leader by Forrester and a Challenger by Gartner. We work with some of the world's most exciting br…

IT Helpdesk

London

  • Skills: IT Helpdesk, Windows 10, MacOS, Active Directory, Office 365, Azure AD, PowerShell, GCP, AWS, Linux
  • Type: full_time
  • Salary: {'min': None, 'max': None, 'period': '', 'currency': ''}