1 to 25 of 50 TCP/IP Jobs in the City of London

specialise in Identity Verification, Managed Endpoints, Threat Detection, Secure Remote Access, and Adaptive Security Policies—balancing exceptional user experience with enterprise-grade security. We operate under an ISO / IEC 27001-certified ISMS and an ITIL-aligned service management framework, ensuring integrity, resilience, and operational excellence. Joining Zero Plus means being part of a growing, people-first organisation … infrastructure as a code practice. Key Responsibilities Design, deploy (IaC), and manage cloud networking solutions across Azure and AWS including, but not limited to, private hosted environment (VPC / Vnet), private connectivity (endpoint, VPN services, etc.) Physical / Virtual / WebApp Firewalls for access controls, and threat detection. Automate provisioning and configuration using Terraform … Ansible, Azure CLI, and PowerShell. Contribute to CI / CD integration for infrastructure as code. Support and evolve exiting topologies and connectivity solutions. Escalation points for connectivity issues with cloud systems and resources. Monitor and optimise performance across hybrid, cross-tenancy, and multi-cloud environments. Implement observability tooling. Ensure compliance with ISO27001 standards, Zero Trust principles, and Well More ❯

proud of. What you would do as our Software Engineer As a Software Engineer you will develop and maintain our portfolio of products using Ruby on Rails, Javascript / Typescript, HTML, and CSS. You will interact with our testing and DevOps teams to facilitate successful production releases of new features. As the role is completely remote, we are … s Turbo (Drive, Frames, Streams) for enhanced performance. • Implement clean, scalable UI components using Tailwind CSS to ensure consistent styling with minimal custom CSS. • Apply foundational networking knowledge (TCP / IP, DNS, HTTP / HTTPS, WebSockets) to create robust and performant applications. • Collaborate effectively across teams, communicate clearly, and operate independently with … familiar with modern JavaScript frameworks, including StimulusJS for adding interactivity to HTML without complex JavaScript, focusing on the "HTML-first" approach. Optional Svelte experience. • Understands networking fundamentals including TCP / IP, DNS, HTTP / HTTPS, and WebSockets. Possess general software engineering skills, ideally in C# and Linux toolchains, Bash scripting and PowerShell. More ❯

from Help Desk and provide technical assistance to end users Assist in telecom phone setup using Cisco Unified Communications Manager and Cisco Unity Connection Administration to create extensions / voice mail and modify users’ phones when requested Setup, dismantling and relocating users’ desks Manage and maintain technology equipment inventory in asset management system Ensuring all Video Conference requests … in accordance with the requestor’s wishes Maintain strong knowledge of third-party video conference systems. Including but not limited to: WebEx, Zoom, MS Teams Travel to Europe / Paris office to provide on-site support to firm’s Paris-based community Technology Support Specialist Skills & Requirements: Bachelor’s degree or Professional certification preferred; similar to A+, N+ … with current Windows Operating Systems, Microsoft Office, Citrix, VPN, Interwoven FileSite, Innova template and other legal industry application Strong knowledge of desktop hardware and peripherals, phones, and A / V equipment (PCs, notebooks, printers, scanners, mobile phones (iOS and Android) Knowledge of network and Internet technologies, protocols and concepts (TCP / IP More ❯

field from a top university (First or 2:1). * Strong knowledge of Windows and macOS environments. * Familiarity with Microsoft 365 or Google Workspace. * Basic understanding of networking (TCP / IP, DNS, DHCP, VPN). * Excellent communication and problem-solving skills. * Detail-oriented and customer-focused with the ability to prioritize tasks. Nice to … software, and network issues for end users. * Configure and deploy laptops, mobile devices, and peripherals. * Assist with user account administration (Active Directory, Office 365). * Support employee onboarding / offboarding and maintain IT asset records. * Install and update standard applications and operating systems. * Provide support for meeting room technology, printers, and video conferencing tools. * Maintain accurate documentation of … any potential employer. Please note we are on the client's supplier list for this position. Keywords Windows, macOS, Office 365, Google Workspace, Active Directory, Azure AD, Intune, TCP / IP, DNS, DHCP, VPN, PowerShell, Bash, Python, Jira, Zendesk, Freshservice, ISO27001, SOC2, IT Support, Helpdesk, Troubleshooting, Hardware, Software, Networking, Ticketing Systems. More ❯

more secure. Take a look at our website here to learn more about why we’re one of the leading global Cyber Security and Risk Mitigation business... https: / / www.nccgroup.com / uk / The Opportunity: As a Malware Analyst you will lead efforts in detecting, analyzing, and mitigating malware threats to … with programming languages such as Python, C++, or assembly for developing analysis tools and scripts. Expertise in creating and maintaining YARA rules. Strong understanding of networking protocols, including TCP / IP, DNS, and how malware utilises these protocols. Ways of working Focusing on Clients and Customers. Working as One NCC. Always Learning. Being Inclusive More ❯

Diploma in Computer Science, Electrical Engineering, or a related field. Technical Skills: Strong understanding of server operations and hardware components. Proficiency with Linux systems for troubleshooting server software / hardware issues. Basic knowledge of network concepts including MAC, Subnet, and TCP / IP. Familiarity with out-of-band / lights-out server … management (e.g., IPMI). Ability to read, understand, and run simple Shell / Bash scripts. Soft Skills: Strong problem-solving and analytical abilities. Good communication skills in English and ability to work effectively in a team. High sense of responsibility, enthusiasm for technical challenges, and ability to work under pressure. Capable of working independently with minimal supervision. Skillset … Summary: Server Operations & Maintenance Linux OS Troubleshooting Hardware Installation & Lifecycle Management Network Fundamentals (TCP / IP, MAC, Subnet) Scripting (Shell / Bash) Asset Management & Ticketing Systems IPMI and Remote Server Management More ❯

days per week in the office) Salary range: £75,000–£84,000 + benefits Tech: AWS (EC2, Lambda, RDS, Route53, ELBs, EKS), Terraform, Kubernetes, Docker, CI / CD (Jenkins, GitHub Actions, CodePipeline), Python / Bash, Ansible, Security frameworks (CIS, OWASP), ** Sponsorship and offshore remote are not available for this position** Immersum continue to support one of … teams to protect customer data and drive platform innovation. Key responsibilities include: Designing and maintaining secure, scalable AWS infrastructure with Terraform, Kubernetes and Docker. Embedding security into CI / CD pipelines (Jenkins, GitHub Actions, CodePipeline) through SAST / DAST and dependency scanning. Collaborating with developers and product teams to promote DevSecOps practices, threat modelling and secure … WAFs for secure web delivery. Responding to incidents and driving continuous improvement of platform security. Tech Stack: Cloud: AWS (EC2, Lambda, RDS, Route53, ELBs, EKS), plus some GCP / Azure exposure Infrastructure as Code: Terraform, Ansible Containers & Orchestration: Kubernetes, Docker CI / CD: Jenkins, GitHub Actions, AWS CodePipeline Monitoring: Prometheus, Grafana, ELK, CloudWatch Security: CIS, OWASP More ❯

Infrastructure Engineer – Azure / Microsoft / Security £70,000 + Bonus + Benefits Hybrid – South West London (3 days onsite) Quant Capital are partnering with a fast-growing FinTech scale-up hiring an Infrastructure Engineer to own their core platform across cloud, networking and security. This role suits someone who understands high availability, engineers with discipline … and cares about building secure, reliable systems at scale. You’ll take technical ownership from day one. You’ll design, operate and improve hybrid Microsoft / Azure infrastructure while acting as a senior escalation point for the business. The Role Engineer, maintain and evolve hybrid Microsoft infrastructure Deliver uptime-focused projects across networking, cloud and security Drive hardening … and operational best practice Troubleshoot complex incidents and enable engineering teams Required Experience 5+ years in infrastructure engineering or systems engineering Strong Microsoft environment expertise: Windows Server, AD / Entra ID, Group Policy, O365, Intune Solid networking foundations: TCP / IP, VLANs, DNS, VPNs, Wi-Fi Security engineering knowledge: System hardening, endpoint More ❯

deliver reliable trading platforms across the enterprise. This is an opportunity to work hands-on with the latest Microsoft technologies - as well as core network infrastructure spanning LAN / WAN, Wi-Fi, firewalls, and cloud connectivity. You’ll contribute to service design and drive automation. The ideal candidate should bring strong TCP / IP networking fundamentals, proven scripting / automation skills (PowerShell or Python), and experience delivering cloud infrastructure (IaaS) and M365 deployments / migrations. Proficiency with Conditional Access, CI / CD pipelines, and Infrastructure-as-Code (e.g., Terraform) is essential. Additional exposure to Exchange Online / Server, Teams, SharePoint, OneDrive, desktop build / deploy automation (Windows 365 / AVD), and config management tools such as Ansible or Puppet will be highly advantageous. To secure the most relevant hire, my client is committed to offering a highly competitive package alongside excellent benefits and a collaborative environment where engineers can thrive and make a visible impact. Apply now via the link More ❯

licensing * Contribute strategically to IT budgeting, vendor management and continuous service improvement initiatives * Provide high-level technical oversight and guidance in areas including: Azure infrastructure management, network protocols (TCP / IP, DHCP, DNS), firewall operations (preferably FortiGate), WAN / LAN / VPN connectivity, Microsoft and Windows Server environments Requirements * Proven … experience in infrastructure / IT operations management within a multi-site environment * Demonstrable experience managing third-party MSPs and IT vendors * Strong leadership and communication skills, with the ability to translate technical priorities into business outcomes * Solid understanding of networking and cloud technologies (Azure preferred) * Relevant certifications (e.g. ITIL, Azure) is highly desirable Initially 4 days per week More ❯

Engineering , Financial Mathematics , or a similar quantitative field. 2–5 years’ experience in a software development or quantitative role. Strong programming skills in Python, C, C++, SQL , and / or C# . Solid understanding of Linux systems. Nice-to-haves Familiarity with TypeScript, React, and SASS / SCSS is a plus. Understanding of financial derivatives , including … volatility modelling and stochastic calculus , is beneficial. Knowledge of networking protocols (TCP / IP, FIX, multicast / unicast, ZeroMQ / RabbitMQ) advantageous. Excellent communication skills, with a collaborative and results-driven mindset . This is a fantastic opportunity for a Front Office Developer seeking to work on impactful technology in More ❯

renowned global legal organisation where no two days are the same, your expertise is valued, and your growth truly matters. What You’ll Be Doing Delivering 2nd-line / floor support across PCs, laptops, mobile devices, printers, and meeting room tech. Managing user accounts (AD, Duo, MS Authenticator, McAfee) and ensuring new starters are fully set up for … and maintaining accurate asset inventories. Updating knowledge bases, creating documentation, and contributing to technical improvements and project work. What We’re Looking For 2+ years’ experience in Desktop / Deskside / 2nd Line Support. Strong troubleshooting across Windows, MS Office, Citrix, Duo, Outlook, and general hardware. Experience with AD, LDAP, networking basics (TCP / IP, DHCP, DNS). Excellent communication, customer service, and organisational skills. Someone curious, adaptable, and eager to learn—ITIL certification a bonus. What’s In It For You? Join a supportive, collaborative IT function with genuine opportunities to grow. Work with modern tech, get involved in projects, and become a subject-matter expert. A professional, people More ❯

with technical matters and system troubleshooting relating to infrastructure, applications and environments. Be part of an on call weekly rotation shared across the Support and Operations teams. Experience / Qualifications Essential requirements Demonstrable knowledge and experience in 3 or more of the following: Microsoft Windows Server Microsoft SQL Server Networking (Load balancing, Firewalls, TCP / IP) Linux (Debian or RHEL) Telephony / UC (SIP, ACD, VOIP) Active Directory (ADFS, domain management, users / groups, policies, certificates etc.) Infrastructure management and maintenance (COTS hardware & Virtualisation - VMware, Hyper-V) Good knowledge and experience of ITIL Experience of managing high availability environments and systems or with similar critical infrastructure delivery … successful in this role. Excellent communication skills - written and verbal. Desirable, but not essential Familiarity with Agile methodologies, tools and ways of working. Experience and knowledge of CI / CD tools. Experience in scripting / coding (Python, C#, PowerShell). Experience of common automation tools (Terraform, Ansible). Experience with monitoring solutions (Nagios, Zabbix, NetCool, Icinga More ❯

and maintaining accurate asset inventories. Updating knowledge bases, creating documentation, and contributing to technical improvements and project work. What We’re Looking For 2+ years’ experience in Desktop / Deskside / 2nd Line Support. Strong troubleshooting across Windows, MS Office, Citrix, Duo, Outlook, and general hardware. Experience with AD, LDAP, networking basics (TCP / IP, DHCP, DNS). Excellent communication, customer service, and organisational skills. Someone curious, adaptable, and eager to learn—ITIL certification a bonus. What’s In It For You? Join a supportive, collaborative IT function with genuine opportunities to grow. Work with modern tech, get involved in projects, and become a subject-matter expert. A professional, people … focused environment where your contribution really counts. Interested? Apply now or reach out for a confidential chat! Perfect for ambitious Desktop Support / 2nd Line Engineers looking to join a stable, high-performing team. To be considered, please ensure you complete your application on the Computappoint website. Services offered by Computappoint Limited are those of an Employment Business More ❯

business owner side Collect and check online assets status or issues Erase drives or other configurations for retiring or relocating servers. Provide retrofitting or test feedback for tools / systems / platforms. Submit and track the part RMA or media destruction process Server network troubleshooting Server lifecycle management Other server operation related work Tidy and escalate … communication skills in English, good team work spirit; Has ability to work independently Knowledge of the interdependencies of server functions and technologies Can understand and run simple Shell / Bash scripts Familiar with Linux system, able to locate hardware faults; Strong analytical and problem solving skills Basic network knowledge concepts - MAC, Subnet, TCP / IP; Ability to perform general troubleshooting Knowledge of out-of-band / lights-out server communication methods, such as IPMI More ❯

Proven experience managing IT infrastructure and systems. Strong knowledge of cybersecurity principles and best practices. Familiarity with cloud platforms (AWS, Azure) and data management tools. Experience with networking (TCP / IP, LAN / WAN, firewalls) and virtualisation technologies. Competence with Windows, Windows Server, and macOS environments. Proficiency in Microsoft 365 (Office, Teams More ❯

1st line teams and working closely with engineering to resolve complex issues. Key Responsibilities: Provide 2nd line technical support across EUC (End User Computing), Microsoft technologies (Windows 10 / 11, M365, Azure), and networking (TCP / IP, DNS, DHCP, LAN / WAN). Troubleshoot and resolve incidents related to including More ❯

Policy Development : Create and enforce security policies and procedures to protect network resources and data. Security Management : Manage and maintain security tools and technologies, including firewalls, intrusion detection / prevention systems, and VPNs. Incident Response : Lead and coordinate responses to security incidents, including investigation, mitigation, and reporting. Compliance : Ensure compliance with relevant security standards and regulations, such as … Nutanix Flow, including micro-segmentation, network visualization, and security policy enforcement. Network Architecture & Design – Proven ability to design and implement secure enterprise-grade network architectures, with expertise in TCP / IP, VLANs, SDN, and routing protocols (BGP, OSPF). Cloud & Hybrid Networking – Strong knowledge of multi-cloud and hybrid cloud security, including AWS, Azure … Zero Trust & Micro-Segmentation – Experience applying Zero Trust principles and implementing fine-grained security controls across cloud environments. Technical Security Expertise – In-depth knowledge of firewalls, VPNs, IDS / IPS, encryption, and security automation using Python, PowerShell, or Terraform. Security Certifications – Industry-recognized certifications such as CISSP, CISM, CCNP Security, AWS Certified Advanced Networking, or Nutanix Certified Professional More ❯

no chance you'll be getting bored anytime soon. Experience: One or more of CISA, CISSP or CRISC Good working knowledge of NIST and COBIT frameworks Data centre / network and workplace architectures Security tooling, risk analysis, or governance roles TCP / IP, HTTP / S, SMTP), proxy servers, email More ❯

urgent requests, and maintain composure during high-stakes technical issues whilst ensuring minimal disruption to business-critical activities. Advanced Desktop & End-User Support: Extensive experience in Level 2 / 3 support across Windows 10 / 11, iOS, and enterprise applications with emphasis on productivity tools. Expert troubleshooting of VIP workstations, laptops, mobile devices, home office setups … during incidents, managing stakeholder expectations, delivering training sessions to VIP users, and building trusted relationships across the organisation. Identity & Access Management: Expert knowledge of Active Directory, Azure AD / Entra ID, group policy management, and privileged access management. Experience with VIP account provisioning, security group memberships, RBAC, conditional access policies, MFA troubleshooting, and understanding of zero-trust security … critical systems. Experience coordinating cross-functional teams during outages, conducting root cause analysis, and implementing preventative measures with detailed post-incident reporting. Network & Connectivity Excellence: Advanced understanding of TCP / IP, DNS, DHCP, VPN technologies, SD-WAN, wireless networking, and remote access solutions. Ability to rapidly diagnose and resolve connectivity issues for remote users More ❯

Key responsibilities include: • Providing advanced 3rd-line support and troubleshooting across servers, networks, and cloud platforms. • Configuring, installing, and managing Windows Server environments and virtualisation platforms (Hyper-V / VMware). • Implementing and maintaining enterprise-level backup solutions using Veeam. • Supporting cloud technologies such as Microsoft 365, Azure, and Google Workspace. • Managing network configurations including DNS, DHCP, VLANs … IP routing, and VPNs. • Assisting in infrastructure upgrades, migrations, and security deployments. • Producing detailed technical documentation and contributing to project delivery. • Acting as a technical escalation point and collaborating closely with senior engineers. What will you need? • Minimum 3+ years’ experience in IT infrastructure or 3rd-line support, ideally within an MSP. • Strong knowledge of Windows Server, Active … Directory, DNS, DHCP, and Group Policy. • Hands-on experience with Hyper-V and / or VMware. • Expertise in Veeam Backup & Replication or similar DR solutions. • Strong networking knowledge (TCP / IP, VLANs, VPNs, routing protocols). • Experience with cloud-based platforms such as Microsoft 365, Google Workspace, or AWS. • Excellent troubleshooting, documentation More ❯

is a hands-on technical position that also gives you the chance to shape processes, documentation, and service improvements. Key Responsibilities Provide 2nd-line support for Windows 10 / 11 and some macOS users Resolve escalated tickets from 1st Line and own issues through to completion Troubleshoot and support networking (WiFi, LAN, VPN, firewalls, switches, WAPs) Manage Office … / Microsoft 365 administration, Azure AD, and related services Deploy software updates, patches, and new applications Configure and troubleshoot network printers and peripherals Perform data backups and restores when required Maintain accurate documentation and contribute to the internal knowledge base Collaborate on recurring issue analysis and continual service improvement Participate in IT projects and initiatives as needed What … At least 2 years’ experience in a 2nd-line or similar IT support role (MSP background is a bonus but not essential) Strong troubleshooting skills across Windows 10 / 11 and macOS In-depth, hands-on experience with Microsoft 365 (Office 365 Admin Centre, Azure AD, Exchange, Teams, Intune / SharePoint) Solid understanding of networking fundamentals More ❯

infrastructure, streamline operations, and contribute to architectural decisions. This is a full hands-on engineering position, offering significant influence over technology choices and the opportunity to introduce AI / LLM integrations into the platform as it evolves. Key Responsibilities Design, build, and manage a secure, scalable platform environment in AWS. Implement and maintain container orchestration using Kubernetes. Develop … with business and regulatory requirements. Apply strong networking knowledge to optimise performance, security, and reliability. Ensure compliance with financial services regulations and internal security policies. Contribute to CI / CD pipelines and cloud-native observability solutions. Explore and integrate emerging technologies including AI / LLM-based solutions to enhance automation and operational efficiency. Key Skills & Experience … Essential: Strong hands-on experience with AWS (EC2, VPC, IAM, S3, ECS / EKS, etc.) Solid understanding of Linux systems administration and troubleshooting Expertise with Kubernetes (deployment, scaling, networking, monitoring) Proficiency in Python for scripting, automation, or tooling development Good understanding of networking principles (TCP / IP, DNS, load balancing, firewalls) Background More ❯

Linux / Kubernetes Engineer - - Investment Bank Up to £100,000 Basic salary 5-days a week onsite in City of London What’s on offer: 10% employer pension contribution Discretionary bonus 30 days holiday Private health and life insurance Enhanced parental leave Flexible working and wellbeing support About Join a tech-forward financial services firm combining 400+ years … the opportunity to expand into cloud where appropriate. What you’ll do: Design and manage highly available Kubernetes clusters across multiple datacentres Collaborate with Linux, infrastructure, and SOC / CERT teams to secure and optimise bare-metal environments Support mission-critical workloads including low-latency trading systems, leveraging tools like Calico, OPA / Gatekeeper, and Kyverno … for policy enforcement and security Replace legacy networking infrastructure with a Kubernetes-first architecture, treating pods as first-class citizens in a highly available, BGP-based leaf / spine fabric Lead systems administration on Ubuntu and RHEL systems, tuning OS configurations for performance, observability, and compliance Develop services like DNS-based discovery and egress gateways for smart routing More ❯

Network and Security Engineer - Palo Alto / Juniper routing Outside IR35 Contract role Hybrid 3-4 visits per month / roughly 1 visit per week - Moorgate nearest tube Must be UK Citizen (due to role requirements) Outside IR35 contract opportunity for a Network and Security Engineer . This role will focus on implementing, testing and documenting … global network. You will need good configuration & troubleshooting skills across Palo Alto firewalls and Panorama , in addition to solid routing & troubleshooting (Juniper) , in addition to precise documentation skills / change control. Experience with Privileged Access Management (PAM) systems is a plus. To be successful in this role the 2 essential key skills required that should also be evidenced … Proven experience with Palo Alto Networks firewalls and Panorama in complex multi-vsys, multi-VR environments. Strong routing and troubleshooting skills (Juniper). Solid understanding of networking fundamentals (TCP / IP, routing, switching, DNS, DHCP). Knowledge of VPN technologies (IPSec, SSL) and related troubleshooting. Excellent problem-solving, analytical, and documentation skills. Clear communication More ❯