Linux administrator jobs in United Kingdom

Linux System Administrator Salary to £70,000 + up to £15,000 in additional bonuses Must be eligible for a high level of UK Government Clearance London location Sanderson Government and Defence are working with one of the world largest technology companies in their UK Secure Government division. They are looking for a Linux System Administrator who holds or is eligible for a high level of UK Government Clearance and who has a genuine interest in the sector. Tech wise, on top of the basic Linux System Administrator skillset they are looking for at least some of the following: • Ansible, • AWS Cloud, • Bash Reasonable Adjustments: Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients. If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.

Job Title: Senior Unix/Linux & Database AdministratorJob Purpose We are seeking a hands-on, experienced Senior Administrator specialising in Unix/Linux environments and database management within the financial services sector. This role is critical to the stability, performance, and scalability of a recently implemented core banking platform (live since October). The successful candidate will be expected to hit the ground running, supporting a complex, high-availability environment spanning 50+ servers and 15-20 databases, while also contributing to ongoing optimisation and platform maturity. Key Responsibilities Database & Platform Management • Administer and optimise enterprise databases (including SQL Server and Oracle environments) supporting core financial applications, • Manage and support clustered database environments, including Oracle RAC, • Support and manage front-end application environments, with experience inFlexcubeorWebLogic, • Manage and maintain Linux and Unix-based servers across a large-scale production estate (50+ servers), • Manage cluster software and high-availability configurations across systems, • Automate routine administrative tasks using shell scripting and modern tooling, • Ensure compliance with IT security standards and financial regulatory requirements, • Align with ITIL processes and formal change management practices, • Provide on-call support and contribute to incident response and operational documentationExperience & Skills Required, • Database Expertise:, • 7+ years in DBA roles, including SQL Server and Oracle, • Strong experience with clustering, storage, and performance tuning, • Hands-on experience with Oracle RAC, • Systems Expertise:, • 5+ years administering enterprise Linux/Unix environments, • Application Layer Experience:, • Experience supporting Flexcube or WebLogic environments, • Technical Skills:, • Advanced SQL and procedural database languages, • Strong Unix/Linux shell scripting skills, • Environment Experience:, • Proven background supporting core banking systems, • Experience working in complex, multi-server, multi-database environments, • Tooling & Processes:, • Familiarity with automation, monitoring, and log analysis tools, • Strong understanding of ITIL and change management frameworks, • Soft Skills:, • Strong problem-solving ability with a proactive, hands-on mindset, • Ability to operate independently in a fast-paced, production-critical environmentAdditional Context, • Recently implemented core banking system (live since October), • Estate includes 50+ servers and 15-20 databases, • Significant focus on stabilisation, optimisation, and scalability, • Requires a candidate who can quickly take ownership and deliver impact

SOLACE MESSAGING ADMINISTRATOR - LONDON KEY POINTS • Salary up to £130,000 + Bonus, • 4 days per week onsite in Canary Wharf, • Supporting critical enterprise Solace messaging systems We're supporting a globally recognised financial services and technology organisation operating at the forefront of electronic trading and market infrastructure. Due to continued growth within their Messaging team, they're looking to appoint an experienced Solace Messaging Administrator to help support and optimise a critical low latency messaging environment. You'll be joining a highly technical, collaborative team responsible for delivering resilient, high throughput messaging systems that underpin pricing, trading, and other mission critical applications across a complex global infrastructure. THE BENEFITS • Competitive bonus structure, • Exposure to enterprise-scale messaging infrastructure, • Opportunity to develop automation and programming skills, • Work within a highly collaborative engineering environment, • Access to modern observability and monitoring tooling As a Solace Messaging Administrator, you'll be responsible for administering and supporting enterprise Solace PubSub+ infrastructure across production and non-production environments. You'll work closely with infrastructure, development, and support teams to ensure messaging reliability, scalability, and performance across mission critical systems. You'll play a key role in incident response, monitoring, capacity planning, WAN optimisation, and automation while helping maintain a highly available messaging platform supporting real-time trading and financial applications. SOLACE MESSAGING ADMINISTRATOR ESSENTIAL SKILLS • Experience administrating critical Solace messaging systems, • Strong background supporting enterprise production environments, • Experience with Solace PubSub+ appliances and software brokers, • Strong understanding of distributed systems and WAN environments, • Experience with Prometheus and Grafana monitoring tools, • Linux/Unix administration and scripting experience, • Strong troubleshooting and analytical problem-solving skills Please either apply through this advert or email me directly via For further information please call me on / . By applying for this role, you give express consent for us to process and submit (subject to required skills) your application to our client in conjunction with this vacancy only. KEY SKILLS Solace, PubSub+, Messaging Administrator, Linux, Prometheus, Grafana, WAN, Low Latency Systems, Distributed Systems, Python, Bash, Infrastructure, Production Support, Kafka, RabbitMQ, Docker, Kubernetes, AWS, Azure, Messaging Systems

DevSecOps Engineers – Mid to Lead Level Location: London Type: Permanent Working Pattern: 4xFlex, 37.5 hours per week We are currently working with a client in the Defence and Security sector who are expanding their London-based team and are looking to hire DevSecOps Engineers with a strong focus on Infrastructure Engineering, across mid to lead level. This opportunity supports a range of programmes across the Defence, Cyber and Intelligence domains, delivering secure, scalable and high-performing infrastructure solutions within mission-critical environments. A key requirement for this position is the ability to obtain and maintain high-level security clearance. If you do not currently hold this, support will be provided throughout the application process. The Role: As a DevSecOps Engineer with an Infrastructure Engineering focus, you will play a central role in the design, integration, administration and security of systems and applications. You will be responsible for building and maintaining scalable, reliable and secure infrastructure, ensuring it supports complex and evolving technical environments. You will work within a multi-disciplined team, collaborating across engineering and delivery functions to integrate and deploy features effectively. Depending on your level of experience, you will either contribute to infrastructure delivery (mid-level) or take on additional responsibility for technical ownership, decision-making and guiding engineering activities (lead level). This role spans the full systems lifecycle, offering exposure to architecture, design, deployment, support, migration and decommissioning activities. You will also have the opportunity to work across Public, Private and Hybrid Cloud environments, helping to optimise performance, scalability and security. Key Responsibilities: • Design, build, deploy and manage a broad range of IT infrastructure aligned to customer requirements, • Apply infrastructure engineering best practices to ensure systems are scalable, reliable and secure, • Develop Infrastructure as Code (IaC) and supporting scripts, integrating these into CI/CD pipelines and wider toolchains, • Drive automation and repeatability across infrastructure deployments and system integration, • Deliver full end-to-end systems lifecycle management, from initial architecture and design through to deployment, support, migration and decommissioning, • Support the integration and delivery of large and complex solutions within wider system-of-systems environments, • Contribute to integration, testing and deployment activities to ensure optimal performance and reliability, • Undertake deployments across Public, Private and Hybrid Cloud environments, identifying constraints and optimising infrastructure performance and security, • Collaborate with multi-disciplinary teams to ensure successful delivery of infrastructure solutions within DevSecOps frameworks Skills & Experience: • Strong experience within DevSecOps environments, working within Agile methodologies (SCRUM, Sprints), • Experience using tools such as Jira and Confluence for planning and collaboration, • Proficiency in Windows and Linux systems administration, including technologies such as Active Directory, • Experience with virtualisation technologies and concepts, including VMware vSphere, ARIA Ops performance monitoring and NSX (software-defined networking), • Experience configuring and managing web proxy servers (e.g. Squid), • Strong experience with automation technologies including Terraform, Ansible and Packer for complex builds, • Experience building and maintaining CI/CD pipelines (e.g. Jenkins), • Understanding of Git-based version control (Git, Bitbucket, GitLab), including integration and branching strategies, • Knowledge of containerisation technologies such as Docker and Kubernetes, • Experience with scripting languages including PowerShell and Bash, • Experience using Python, • Solid understanding of networking fundamentals, including IPv4 addressing and routing, • Experience with logging and monitoring tools such as Zabbix and Splunk, • Understanding of cloud technologies and concepts, particularly AWS Certification (Desirable): AWS Certification / CCNA Certification / Oracle Java Certification / ISTQB Certification / OSCP Certification / Linux Administration (RHCSA or RHCE) / Microsoft Certified: Windows Server Hybrid Administrator Associate / Red Hat Certified Specialist in Ansible Automation (EX407) / Terraform / Associate Certification PLEASE NOTE: eDV clearance is required to start. The process can take up to 18 months

Database Administrator Based in: City of London, Shoreditch/Hybrid About Amelco UK Ltd We are a leading gaming and gambling solution software provider with a strong presence in the USA, UK, and Europe. Through partnerships with global gaming companies, we build cutting-edge technical platforms across sportsbooks, lottery, casino, virtual gaming, and financial trading. Our vision is to shape the future of gaming by transforming operations into intelligent, data-driven solutions that deliver exceptional customer experiences and create sustainable value for all stakeholders. We believe in teamwork, knowledge sharing, and transparency with accountability. Technical Stack Our data ecosystem is built for massive scale and diverse query patterns: • Orchestration: Kubernetes (EKS), Terraform, Ansible and on-prem., • Data Pipelines: Kafka, CDC (Change Data Capture) tools like Debezium. Key Responsibilities • Multi-Engine Management: Administer a hybrid database environment, ensuring seamless data flow between PostgreSQL (Live Trading) and ClickHouse/Snowflake (Analytics)., • Data Movement & ETL: Own the reliability of CDC pipelines that stream data from production Postgres instances into the analytical layer., • Schema Evolution: Manage schema changes across different engines, ensuring that transactional data models translate effectively into columnar formats for analytics., • Monitoring & Cost Governance: Implement unified observability for the entire stack. Specifically, monitor Snowflake credit usage and ClickHouse resource utilisation to ensure peak ROI., • Automation: Use Python, Bash and/or Ansible to automate routine maintenance tasks, deployments and monitoring services. Technical Requirements & Experience Essential • Experience with AWS (specifically RDS and Aurora)., • Proficiency in Linux/Unix administration and shell scripting., • Knowledge of monitoring tools (e.g., Prometheus, Grafana, CloudWatch). Desirable • Knowledge of the betting or financial trading industry., • Relevant certifications (AWS Certified Database, Postgres Professional). Soft Skills • Problem Solver: You enjoy "under the hood" troubleshooting and RCA (Root Cause Analysis)., • Calm Under Pressure: Ability to handle high-stakes production incidents effectively., • Communicator: Can translate complex technical database issues to non-technical stakeholders. -Team Player: Enthusiastic about knowledge sharing and mentoring others. Amelco Benefits • Amelco matches up to 7% of your base salary. You will automatically be entered at 4%., • Staff Benefits Scheme: access to the staff benefits portal after successful completion of a 6-month probation period., • Yearly bonus scheme and pay reviews, • Opportunity to travel and visit our office in Poland and Hungary, • Flexible ways of working – home or office, it’s your choice! If you are interested, hit the apply button, and please ensure you upload a copy of your CV. We look forward to hearing from you!

Systems and Cloud Engineer Our top-tier US law firm client that values collaboration and innovation, is recruiting a knowledgeable Systems and Cloud Engineer to join their close-knit team of three in London. The Systems and Cloud Engineer is part of the Information Technology department, working as a member of a highly technical engineering team in the design, implementation, and operation of enterprise-wide systems infrastructure and cloud technologies. • Competitive salary, • Hybrid, • Superb employee benefits, including a £100 monthly employee contribution, free lunch every Wednesday, discretionary bonuses, and more!, • Office based – Liverpool Street This is a hands-on technical role within the Enterprise Systems team. This individual will help architect, secure, and operate the firms platform while maintaining critical hybrid infrastructure services that support the Firm’s international business. Systems and Cloud Engineer Key Responsibilities: • Create and execute cloud computing strategies by designing, developing, and managing cloud infrastructure and assets to help the Firm meet its business goals., • Provide architectural direction and hands-on engineering for secure hybrid infrastructure across Azure, 3rd party SaaS platforms, and on-premises systems., • Design and evolve an enterprise Azure landing zone and multi-subscription architecture (management groups, policy/RBAC, naming/tagging standards, shared services)., • Deploy and operate Azure IaaS/PaaS services such as virtual machines, storage (Azure Files/File Shares), and platform services aligned to business requirements., • Plan and execute infrastructure movement techniques (VMware/Windows/Linux), including application migrations, into Azure, by discovery, dependency mapping, landing zone readiness, cutover planning, and decommissioning., • Own core Azure networking design and operations, including vNETs/subnets, routing, peering, private endpoints, NSGs, and network security patterns., • Manage hybrid connectivity concepts such as ExpressRoute, vWAN, VPN gateways, and integration with on-prem network services., • Partner with network/security teams to implement segmentation and secure access to applications and data., • Implement and maintain Azure security and governance controls (Policy/initiative, RBAC, logging/monitoring, and automated compliance guardrails)., • Maintain working knowledge and provide escalation support of VMware vSphere environment, Windows Servers, Active Directory services, DHCP/DNS, and other core enterprise systems., • Responsible for system designs, root cause problem elimination, and capacity planning of enterprise data center infrastructure. Systems and Cloud Engineer Requirements: • Excellent in managing cloud solutions (IaaS, PaaS, and SaaS) and implementing design best practices., • 5+ years of hands-on experience designing, deploying, and operating Microsoft Azure in an enterprise environment., • Infrastructure-as-Code and automation experience (Terraform and/or equivalent; PowerShell scripting) to deploy and maintain cloud and hybrid infrastructure, including reusable modules and CI/CD integrations., • Experience supporting Microsoft 365 services; familiarity with Purview concepts (eDiscovery, retention) strongly preferred., • Familiarity with Microsoft Fabric and AI-enabled productivity/security concepts (e.g., Copilot) and their governance implications., • Relevant certifications (e.g., Azure Administrator, Azure Solutions Architect Expert, Terraform) preferred., • Experience operating in highly regulated environments (legal, financial services, or similar) is preferred., • Demonstrates initiative, personal awareness, professionalism, and exercises confidentiality by practicing discretion regarding Firm, client, and personal information., • AWS experience (architecture or operations) is a plus.

SOLACE MESSAGING ADMINISTRATOR – LONDON KEY POINTS • Salary up to £130,000 + Bonus, • 4 days per week onsite in Canary Wharf, • Supporting critical enterprise Solace messaging systems, • Opportunity to work within a low latency, high throughput trading environment ABOUT THE CLIENT We’re supporting a globally recognised financial services and technology organisation operating at the forefront of electronic trading and market infrastructure. Due to continued growth within their Messaging team, they’re looking to appoint an experienced Solace Messaging Administrator to help support and optimise a critical low latency messaging environment. You’ll be joining a highly technical, collaborative team responsible for delivering resilient, high throughput messaging systems that underpin pricing, trading, and other mission critical applications across a complex global infrastructure. THE BENEFITS • Competitive bonus structure, • Exposure to enterprise-scale messaging infrastructure, • Opportunity to develop automation and programming skills, • Work within a highly collaborative engineering environment, • Access to modern observability and monitoring tooling, • Long-term progression opportunities within infrastructure and messaging engineering THE SOLACE MESSAGING ADMINISTRATOR ROLE: As a Solace Messaging Administrator, you’ll be responsible for administering and supporting enterprise Solace PubSub+ infrastructure across production and non-production environments. You’ll work closely with infrastructure, development, and support teams to ensure messaging reliability, scalability, and performance across mission critical systems. You’ll play a key role in incident response, monitoring, capacity planning, WAN optimisation, and automation while helping maintain a highly available messaging platform supporting real-time trading and financial applications. SOLACE MESSAGING ADMINISTRATOR ESSENTIAL SKILLS • Experience administrating critical Solace messaging systems, • Strong background supporting enterprise production environments, • Experience with Solace PubSub+ appliances and software brokers, • Strong understanding of distributed systems and WAN environments, • Experience with Prometheus and Grafana monitoring tools, • Linux/Unix administration and scripting experience, • Strong troubleshooting and analytical problem-solving skills, • Experience supporting low latency, high throughput messaging systems TO BE CONSIDERED: Please either apply through this advert or email me directly via For further information please call me on 0203 763 3888 / 07704 152 638. By applying for this role, you give express consent for us to process and submit (subject to required skills) your application to our client in conjunction with this vacancy only. KEY SKILLS Solace, PubSub+, Messaging Administrator, Linux, Prometheus, Grafana, WAN, Low Latency Systems, Distributed Systems, Python, Bash, Infrastructure, Production Support, Kafka, RabbitMQ, Docker, Kubernetes, AWS, Azure, Messaging Systems

Ensure system security, availability, and performance by applying patches, monitoring systems, and conducting regular audits. Maintain documentation for system configurations, processes, and standard operating procedures. Perform root cause analysis on system failures and implement long-term fixes.

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Technical Support Specialist (with device focus).Technical Support Specialist (with device focus).Be among the first 25 applicants.Direct message the job poster from N Consulting Global.Lab Admin – Onsite | 6–12 Month Contract | London, UK.Linux environments, hardware management, and lab operati

UK CITIZENSHIP REQUIRED FOR THIS POSITION Location: South West London Salary: £45k - £55k Clearance: SC (or eligible) IT Infrastructure Administrator to work across IT and Operational Technology (OT) teams at a defence company based in London. Infrastructure Systems Administrator will design, develop, and maintain secure infrastructure for defence platform management systems for military vehicles. Responsibilities: Designing ICS Infrastructure for Integrated Platform Management Systems, ensuring defence-grade security. Integrating IT/OT systems to support mission-critical operations. Managing Windows Server and Red Hat Linux environments. Implementing virtualisation solutions; either VMware or Hyper-V. Enforcing cybersecurity standards. Requirements: Proven experience in IT infrastructure, IT and OT integration preferred. Strong skills in Windows Server domains and some Linux. Hands-on experience with virtualisation technologies like VMware and Hyper-V. Knowledge of cybersecurity standards. Must be eligible for Security Clearance and be a UK Citizen