1 to 25 of 78 TCP/IP Jobs in the City of London

2nd Line IT Support Engineer London Bridge, SE1 – Hybrid (1 week office / 1-week WFH) £38,000 – £42,000 + training + bonus + perks Our client is a growing London-based MSP with a loyal client base and a reputation for going the extra mile. They’re all about great service, teamwork and continuous improvement — and … Recommending improvements and contributing to IT projects and rollouts What You’ll Bring You’re confident, curious and customer-focused, with: Strong hands-on experience with Windows 10 / 11 and macOS Solid understanding of LAN / WAN / Wi-Fi networking Proficiency in Windows Server 2012 / 2016 / 2019 and technologies like: Active Directory, Hyper-V, DNS, DHCP, DFS, ADFS, FAP Knowledge of PC setup , TCP / IP networking and system configuration Experience with cloud platforms such as Office 365, Google Workspace, AWS or Azure Why Join? Hybrid flexibility – split your time between home and their London Bridge office Supportive 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 ❯

based in London. This is a hands-on engineering role at the frontier of high-performance trading systems What You’ll Do Design and implement modern C++ (C++20 / 23) applications for ultra-low latency trading. Optimize performance at the CPU, kernel, and network stack level to minimize latency and maximize throughput. Engineer and maintain Linux-based systems … tuned for high-frequency trading workloads. Develop and refine TCP / IP networking solutions for market connectivity. Collaborate with traders, researchers, and engineers to deliver robust, production-ready systems. Explore opportunities to integrate AI / ML techniques into trading workflows, from signal generation to system optimization. What We’re Looking For Proficiency … performance-critical applications. Deep understanding of CPU architecture, cache optimization, memory management, and instruction pipelines . Exposure to Linux kernel-level programming and tuning . Solid knowledge of TCP / IP networking and experience building high-throughput, low-latency network applications. Proven track record of developing real-time, high-performance systems (finance, gaming, or More ❯

based in London. This is a hands-on engineering role at the frontier of high-performance trading systems What You’ll Do Design and implement modern C++ (C++20 / 23) applications for ultra-low latency trading. Optimize performance at the CPU, kernel, and network stack level to minimize latency and maximize throughput. Engineer and maintain Linux-based systems … tuned for high-frequency trading workloads. Develop and refine TCP / IP networking solutions for market connectivity. Collaborate with traders, researchers, and engineers to deliver robust, production-ready systems. Explore opportunities to integrate AI / ML techniques into trading workflows, from signal generation to system optimization. What We’re Looking For Proficiency … performance-critical applications. Deep understanding of CPU architecture, cache optimization, memory management, and instruction pipelines . Exposure to Linux kernel-level programming and tuning . Solid knowledge of TCP / IP networking and experience building high-throughput, low-latency network applications. Proven track record of developing real-time, high-performance systems (finance, gaming, or More ❯

role will also allow you to work and learn from our Infrastructure, Communications, iSeries and Development Teams – semi-involved with various exciting streams of IT projects for 2025 / 26 year (examples - Office 2024 roll out / Improvements on ITSM, Windows 11 roll out to all User hardware and much more). Principal Accountabilities and Duties … . As we work closely with our parent company Arab Bank (Jordan) and our European Branches, we require supporting ad-hoc out of hours support on Bank Holidays / Weekends which is rota-based between the engineers in the team. Be an integral part of the Support team in supporting and delivering all aspect of services and full … and Hardware, AD Management, Asset Management, Ticket Queuing Management and general overall efficiency to deliver the best service we can to our Users. 1st and 2nd Line Troubleshooting / Root-Cause Analysis, Documentation write ups for Knowledge Base Articles Be the face and central point of all incoming IT queries and issues, with following ITIL best practice to More ❯

role will also allow you to work and learn from our Infrastructure, Communications, iSeries and Development Teams – semi-involved with various exciting streams of IT projects for 2025 / 26 year (examples - Office 2024 roll out / Improvements on ITSM, Windows 11 roll out to all User hardware and much more). Principal Accountabilities and Duties … . As we work closely with our parent company Arab Bank (Jordan) and our European Branches, we require supporting ad-hoc out of hours support on Bank Holidays / Weekends which is rota-based between the engineers in the team. Be an integral part of the Support team in supporting and delivering all aspect of services and full … and Hardware, AD Management, Asset Management, Ticket Queuing Management and general overall efficiency to deliver the best service we can to our Users. 1st and 2nd Line Troubleshooting / Root-Cause Analysis, Documentation write ups for Knowledge Base Articles Be the face and central point of all incoming IT queries and issues, with following ITIL best practice to 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 ❯

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 ❯

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 ❯

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 ❯

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 ❯

2nd Line IT Support Engineer London Bridge, SE1 Hybrid (1 week office / 1-week WFH) £38,000 £42,000 + training + bonus + perks Our client is a growing London-based MSP with a loyal client base and a reputation for going the extra mile. They re all about great service, teamwork and continuous improvement and … Recommending improvements and contributing to IT projects and rollouts What You ll Bring You re confident, curious and customer-focused, with: Strong hands-on experience with Windows 10 / 11 and macOS Solid understanding of LAN / WAN / Wi-Fi networking Proficiency in Windows Server 2012 / 2016 / 2019 and technologies like: Active Directory, Hyper-V, DNS, DHCP, DFS, ADFS, FAP Knowledge of PC setup , TCP / IP networking and system configuration Experience with cloud platforms such as Office 365, Google Workspace, AWS or Azure Why Join? Hybrid flexibility split your time between home and their London Bridge office Supportive 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 ❯

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 ❯

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 ❯

Sales Engineer – Networks, SD-WAN & Cyber Security London | Hybrid 3 days / week | Competitive + Benefits £45 / 60k (DOE) + bonus We’re partnering with a rapidly growing, award-winning UK MSP to hire a Sales Engineer to support presales and solution consulting across Networks, SD-WAN, SASE, and Cyber Security. This is a hands … What We’re Looking For: Experience in Managed IT, networking, or telecoms. Solid technical knowledge across at least two areas: Networking, SD-WAN, SASE, Cyber Security. Understanding of TCP / IP, L2 / L3 switching, OSPF / BGP, firewalls, VPNs, and wireless networking principles. Excellent communication and problem-solving skills. … Agile, organised, and capable of managing multiple projects simultaneously. Nice-to-Haves: Presentation skills and commercial awareness. Technical certifications relevant to networking or security. Familiarity with Private / Public Cloud environments. This is an exciting opportunity to grow your technical and presales expertise in a high-performing, client-focused environment. More ❯

Sales Engineer – Networks, SD-WAN & Cyber Security London | Hybrid 3 days / week | Competitive + Benefits £45 / 60k (DOE) + bonus We’re partnering with a rapidly growing, award-winning UK MSP to hire a Sales Engineer to support presales and solution consulting across Networks, SD-WAN, SASE, and Cyber Security. This is a hands … What We’re Looking For: Experience in Managed IT, networking, or telecoms. Solid technical knowledge across at least two areas: Networking, SD-WAN, SASE, Cyber Security. Understanding of TCP / IP, L2 / L3 switching, OSPF / BGP, firewalls, VPNs, and wireless networking principles. Excellent communication and problem-solving skills. … Agile, organised, and capable of managing multiple projects simultaneously. Nice-to-Haves: Presentation skills and commercial awareness. Technical certifications relevant to networking or security. Familiarity with Private / Public Cloud environments. This is an exciting opportunity to grow your technical and presales expertise in a high-performing, client-focused environment. 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 ❯

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 ❯

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 ❯