1 to 25 of 52 TCP/IP Jobs in the City of London

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 ❯

We're looking for a hands-on System / Platform Engineer to join our client's London office and support a small, high-performing development team. This role is ideal for someone with a strong Linux and cloud background who's also experienced with Squid, CDN, or proxy technologies especially in environments that involve web scraping or data … platform running smoothly and efficiently. What You'll Do Manage and maintain Linux-based systems (deployment, monitoring, troubleshooting) Set up, optimize, and manage Squid, Nginx, or other proxy / CDN layers Support cloud infrastructure (AWS preferred; GCP / Azure also welcome) Automate deployments and infrastructure tasks using Terraform / Ansible / scripts … handle incident response, and continuously improve reliability Manage networking configurations (DNS, load balancing, VPNs, routing) Must-Have Skills: At least 3 years of hands-on experience in System / Platform / Cloud Engineering Solid Linux administration and troubleshooting skills Strong experience with Squid, CDN, or proxy management Experience with AWS (EC2, S3, VPC, IAM, etc.) or More ❯

conduct in all interactions Resilience and adaptability in the face of change A collaborative mindset, supporting others to deliver shared outcomes Essential Skills Proficiency in: Windows OS (installation / troubleshooting) Active Directory, Azure / Office365 / SharePoint Networking protocols: OSI model, TCP / IP, HTTP / 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 £65,000 + 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 ❯

A10 Network Engineer (DV / SC Cleared) We are seeking an experienced A10 Network Engineer for a 6 month contract, inside IR35, supporting high-security environments. Youll be working on complex network infrastructure, primarily focused on A10 Networks Application Delivery Controllers (ADCs) and security solutions. This role demands a hands-on engineer with a solid understanding of high … and processes in line with security compliance standards Essential Skills & Experience: Proven experience working with A10 Networks (Thunder ADC, CGNAT, SSL Insight) In-depth understanding of networking protocols TCP / IP, HTTP / S, DNS, SSL / TLS, BGP, OSPF Experience with load balancing, application delivery, and traffic optimisation Active 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 ❯

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 ❯

Experience Minimum 10 years of software development experience using C and C++ Advanced proficiency in Linux systems (e.g., system calls, multi-threading, IPC, sockets, scheduler) Knowledge of FIX / ITCH / OUCH protocols and hands-on experience building applications utilizing them Strong understanding of networking protocols, including TCP / IP … 29West, ActiveMQ) In-depth knowledge of in-memory data management, data structures, and optimization techniques Understanding of NUMA architecture and NUMA-aware programming Proven track record developing client / server applications Skilled in troubleshooting and performance optimization Working knowledge of financial instruments including Fixed Income, Money Markets, and Derivatives Experience with kernel bypass network drivers (e.g., Solarflare) Technology 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 ❯

Checkpoint & Fortinet Overview: My client are looking for an experienced Network Firewall Engineer for an initial 6 month contract. The role is INSIDE of IR35 and paying £530P / D. This contract is initial 6 Month Contract The client are looking for a candidate with strong Checkpoint and Fortinet technologies to support and secure mission-critical telecom infrastructure. … activities. Required Skills & Experience: Proven hands-on experience with Checkpoint (Gaia, R80) and Fortinet (FortiGate, FortiManager, FortiAnalyzer) firewalls. In-depth knowledge of firewall policy configuration, NAT, VPNs (IPSec / SSL), IPS / IDS, and ACLs. Skilled in patch management and upgrade procedures for firewall platforms. Strong troubleshooting capabilities in high-availability, carrier-grade telecom networks. Solid … grasp of core networking protocols such as TCP / IP, BGP, OSPF, and VLANs. Experience with log analysis tools and SIEM systems. Background in the telecom industry, especially with large-scale service provider networks. Excellent analytical thinking, communication, and problem-solving skills. Preferred Certifications: Checkpoint Certified Security Expert (CCSE) Fortinet NSE4 or NSE7 , or 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 ❯

internal architects, hardware teams, and the Head of Department to drive innovation and transformation of the router stack. What you'll bring Strong software development experience in C / C++ on Linux, with a solid understanding of the software development lifecycle. Expertise in software architecture for IP routers and network devices (VoIP, DSL, GPON, DOCSIS, Wi … Fi), and familiarity with protocols like TCP / IP, SIP, RTP, PPP, DHCP, IPv4 / IPv6, OpenSync, OVS, TR-069, and WebPA. Excellent communication skills, able to adapt technical detail to suit different audiences, and a collaborative mindset that supports team success. Highly organised and self-motivated, thriving in fast-paced environments More ❯

internal architects, hardware teams, and the Head of Department to drive innovation and transformation of the router stack. What you'll bring Strong software development experience in C / C++ on Linux, with a solid understanding of the software development lifecycle. Expertise in software architecture for IP routers and network devices (VoIP, DSL, GPON, DOCSIS, Wi … Fi), and familiarity with protocols like TCP / IP, SIP, RTP, PPP, DHCP, IPv4 / IPv6, OpenSync, OVS, TR-069, and WebPA. Excellent communication skills, able to adapt technical detail to suit different audiences, and a collaborative mindset that supports team success. Highly organised and self-motivated, thriving in fast-paced environments More ❯

internal architects, hardware teams, and the Head of Department to drive innovation and transformation of the router stack. What you'll bring Strong software development experience in C / C++ on Linux, with a solid understanding of the software development lifecycle. Expertise in software architecture for IP routers and network devices (VoIP, DSL, GPON, DOCSIS, Wi … Fi), and familiarity with protocols like TCP / IP, SIP, RTP, PPP, DHCP, IPv4 / IPv6, OpenSync, OVS, TR-069, and WebPA. Excellent communication skills, able to adapt technical detail to suit different audiences, and a collaborative mindset that supports team success. Highly organised and self-motivated, thriving in fast-paced environments More ❯

internal architects, hardware teams, and the Head of Department to drive innovation and transformation of the router stack. What you'll bring Strong software development experience in C / C++ on Linux, with a solid understanding of the software development lifecycle. Expertise in software architecture for IP routers and network devices (VoIP, DSL, GPON, DOCSIS, Wi … Fi), and familiarity with protocols like TCP / IP, SIP, RTP, PPP, DHCP, IPv4 / IPv6, OpenSync, OVS, TR-069, and WebPA. Excellent communication skills, able to adapt technical detail to suit different audiences, and a collaborative mindset that supports team success. Highly organised and self-motivated, thriving in fast-paced environments More ❯

internal architects, hardware teams, and the Head of Department to drive innovation and transformation of the router stack. What you'll bring Strong software development experience in C / C++ on Linux, with a solid understanding of the software development lifecycle. Expertise in software architecture for IP routers and network devices (VoIP, DSL, GPON, DOCSIS, Wi … Fi), and familiarity with protocols like TCP / IP, SIP, RTP, PPP, DHCP, IPv4 / IPv6, OpenSync, OVS, TR-069, and WebPA. Excellent communication skills, able to adapt technical detail to suit different audiences, and a collaborative mindset that supports team success. Highly organised and self-motivated, thriving in fast-paced environments More ❯

internal architects, hardware teams, and the Head of Department to drive innovation and transformation of the router stack. What you'll bring Strong software development experience in C / C++ on Linux, with a solid understanding of the software development lifecycle. Expertise in software architecture for IP routers and network devices (VoIP, DSL, GPON, DOCSIS, Wi … Fi), and familiarity with protocols like TCP / IP, SIP, RTP, PPP, DHCP, IPv4 / IPv6, OpenSync, OVS, TR-069, and WebPA. Excellent communication skills, able to adapt technical detail to suit different audiences, and a collaborative mindset that supports team success. Highly organised and self-motivated, thriving in fast-paced environments More ❯