51 to 75 of 78 TCP/IP Jobs in the City of London

software applications including operating systems (Windows, macOS), productivity tools (Microsoft O365), and fintech applications (Bloomberg, Trafix). Perform basic network troubleshooting including Wi-Fi connectivity, VPN setup, and IP configuration. Document support tickets, resolutions, and user interactions in the IT helpdesk system. Conduct user training on IT best practices, security awareness, and new tools. Maintain IT asset inventory … and ensure compliance with company security policies. Requirements 3+ years of proven IT support experience. Strong knowledge of Windows 10 / 11, macOS, and Microsoft Office 365 (including SharePoint Online, MS Teams and Outlook). Familiarity with Active Directory, Entra and Exchange Online. Understanding of networking concepts (TCP / IP, DNS, DHCP … opportunities and certification reimbursement. Collaborative and inclusive work culture. We are an equal opportunities employer and welcome applications from all qualified candidates regardless of race, sex, disability, religion / belief, sexual orientation, or age. More ❯

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 … issues and resolve incidents quickly. Implement observability using Azure Monitor, Log Analytics, and Network Watcher. Automate provisioning and configuration using Terraform, Azure CLI, and PowerShell. Contribute to CI / CD integration for infrastructure as code. Ensure compliance with ISO27001 standards and Zero Trust principles. Manage firewalls, access controls, and threat detection. Maintain accurate documentation and mentor junior engineers. … national impact. What We’re Looking For We would love to hear from you if you have: Proven experience in Azure networking and cloud infrastructure. Strong understanding of TCP / IP, DNS, DHCP, routing, and firewall principles. Hands-on experience with Azure networking services (VNets, App Gateway, Firewall & WAF, Network Watcher, Load Balancer). More ❯

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 … issues and resolve incidents quickly. Implement observability using Azure Monitor, Log Analytics, and Network Watcher. Automate provisioning and configuration using Terraform, Azure CLI, and PowerShell. Contribute to CI / CD integration for infrastructure as code. Ensure compliance with ISO27001 standards and Zero Trust principles. Manage firewalls, access controls, and threat detection. Maintain accurate documentation and mentor junior engineers. … national impact. What We’re Looking For We would love to hear from you if you have: Proven experience in Azure networking and cloud infrastructure. Strong understanding of TCP / IP, DNS, DHCP, routing, and firewall principles. Hands-on experience with Azure networking services (VNets, App Gateway, Firewall & WAF, Network Watcher, Load Balancer). More ❯

progression within a dynamic, forward-thinking engineering team What You’ll Do Take ownership of the day-to-day management and stability of the organisation’s global Linux / Unix infrastructure, spanning on-premises and cloud environments. Build, optimise, and secure AWS environments using Infrastructure-as-Code tools such as Terraform. Develop and maintain automation frameworks for provisioning … to ensure readiness across all critical systems. Contribute to strategic discussions around infrastructure design, capacity planning, and future platform evolution. What You’ll Need Strong background in RHEL / Linux systems administration and automation Hands-on experience with AWS and related services (EC2, S3, IAM, RDS) Expertise in Terraform, Puppet, Foreman, and Unix shell scripting Solid understanding of … networking fundamentals (TCP / IP, DNS, SFTP, NTP, etc.) Experience with enterprise server hardware (HP, Dell) and storage technologies Familiarity with virtualisation and containerisation (VMware, Docker) Excellent analytical, troubleshooting, and communication skills Degree in Computer Science, Engineering, or a related field — or equivalent practical experience Desirable: Experience in financial services environments, CI / More ❯

progression within a dynamic, forward-thinking engineering team What You’ll Do Take ownership of the day-to-day management and stability of the organisation’s global Linux / Unix infrastructure, spanning on-premises and cloud environments. Build, optimise, and secure AWS environments using Infrastructure-as-Code tools such as Terraform. Develop and maintain automation frameworks for provisioning … to ensure readiness across all critical systems. Contribute to strategic discussions around infrastructure design, capacity planning, and future platform evolution. What You’ll Need Strong background in RHEL / Linux systems administration and automation Hands-on experience with AWS and related services (EC2, S3, IAM, RDS) Expertise in Terraform, Puppet, Foreman, and Unix shell scripting Solid understanding of … networking fundamentals (TCP / IP, DNS, SFTP, NTP, etc.) Experience with enterprise server hardware (HP, Dell) and storage technologies Familiarity with virtualisation and containerisation (VMware, Docker) Excellent analytical, troubleshooting, and communication skills Degree in Computer Science, Engineering, or a related field — or equivalent practical experience Desirable: Experience in financial services environments, CI / More ❯

Responsibilities: Design and develop reliable internal platforms and automation tools supporting trading and research functions. (80% of this role will be hands on core systems development, 20% Network / Linux work) Improve developer productivity through build systems, CI / CD pipelines, and self-service tooling. Enhance monitoring, alerting, and workflow systems to ensure operational resilience. Collaborate … across teams to deliver efficient, scalable infrastructure solutions. Ideal Background: Strong programming ability in GoLang, C++ or Python. Excellent understanding of Linux systems and TCP / IP networking fundamentals. Experience building automation or internal developer tools adopted across teams. Familiarity with CI / CD processes, Git, and modern development workflows. Exposure to More ❯

Responsibilities: Design and develop reliable internal platforms and automation tools supporting trading and research functions. (80% of this role will be hands on core systems development, 20% Network / Linux work) Improve developer productivity through build systems, CI / CD pipelines, and self-service tooling. Enhance monitoring, alerting, and workflow systems to ensure operational resilience. Collaborate … across teams to deliver efficient, scalable infrastructure solutions. Ideal Background: Strong programming ability in GoLang, C++ or Python. Excellent understanding of Linux systems and TCP / IP networking fundamentals. Experience building automation or internal developer tools adopted across teams. Familiarity with CI / CD processes, Git, and modern development workflows. Exposure to More ❯

Shell or Python scripts • Familiar with simple automation tools, such as Ansible • Familiar with Linux system, able to locate hardware faults; Strong analytical and problem solving skills • Basic TCP / IP knowledge concepts – Subnetting, VLANs, DNS, Ipv6; Ability to perform general troubleshooting • Knowledge of out-of-band / lights-out server communication … a competitive edge in their respective markets. Applying to this job implies your agreement with: In compliance with the applicable data protection regulations (General Data Protection Regulation 679 / 2016), we at Centific, as data Controllers, inform you that the data collected will be processed to manage your application in the selection process. This processing is legitimized by More ❯

Shell or Python scripts • Familiar with simple automation tools, such as Ansible • Familiar with Linux system, able to locate hardware faults; Strong analytical and problem solving skills • Basic TCP / IP knowledge concepts – Subnetting, VLANs, DNS, Ipv6; Ability to perform general troubleshooting • Knowledge of out-of-band / lights-out server communication … a competitive edge in their respective markets. Applying to this job implies your agreement with: In compliance with the applicable data protection regulations (General Data Protection Regulation 679 / 2016), we at Centific, as data Controllers, inform you that the data collected will be processed to manage your application in the selection process. This processing is legitimized by More ❯

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 What we offer Onsite - London Full Time Employment; Permanent Contract Schedule: Monday until Friday + either Saturday or Sunday (6 days a week) Attractive Remuneration Package Career Growth Opportunities Skills Enhancement through Udemy Business … a competitive edge in their respective markets. Applying to this job implies your agreement with: In compliance with the applicable data protection regulations (General Data Protection Regulation 679 / 2016), we at Centific, as data Controllers, inform you that the data collected will be processed to manage your application in the selection process. This processing is legitimized by More ❯

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 What we offer Onsite - London Full Time Employment; Permanent Contract Schedule: Monday until Friday + either Saturday or Sunday (6 days a week) Attractive Remuneration Package Career Growth Opportunities Skills Enhancement through Udemy Business … a competitive edge in their respective markets. Applying to this job implies your agreement with: In compliance with the applicable data protection regulations (General Data Protection Regulation 679 / 2016), we at Centific, as data Controllers, inform you that the data collected will be processed to manage your application in the selection process. This processing is legitimized by More ❯

and data integrity. Collaborate effectively across the business, working with engineers, managers, and vendors to resolve issues and provide expert input for technical briefings and project planning. Skills / Must have: Deep, hands-on expertise across various Linux distributions (such as Rocky, Debian, or Ubuntu). A proven track record in designing, building, and operating complex, high-availability … distributed systems. Strong experience with modern infrastructure tooling, including monitoring / logging (e.g., Grafana, ELK), cloud platforms (AWS, GCP, Azure), and automation (e.g., Ansible, Puppet). Solid knowledge of core networking technologies, including the TCP / IP stack, switching, routing, and multicast. Demonstrable experience in system hardening, security best practices, and performance More ❯

and data integrity. Collaborate effectively across the business, working with engineers, managers, and vendors to resolve issues and provide expert input for technical briefings and project planning. Skills / Must have: Deep, hands-on expertise across various Linux distributions (such as Rocky, Debian, or Ubuntu). A proven track record in designing, building, and operating complex, high-availability … distributed systems. Strong experience with modern infrastructure tooling, including monitoring / logging (e.g., Grafana, ELK), cloud platforms (AWS, GCP, Azure), and automation (e.g., Ansible, Puppet). Solid knowledge of core networking technologies, including the TCP / IP stack, switching, routing, and multicast. Demonstrable experience in system hardening, security best practices, and performance More ❯

high-pressure situations while working alongside traders, developers and other engineering teams Strong problem-solving skills and the ability to troubleshoot technical issues under pressure Knowledge of Linux / Unix environments Experience with scripting languages such as Python and Bash for automation tasks Ability to devise complex SQL database queries and updates Basic networking knowledge, including multicast, TCP / IP, DNS, DHCP and common network troubleshooting tools The environment is that of Facebook or Google, relaxed open with time to think and make the right decisions. The atmosphere is calm and relaxed with an open dress code. This is a role for techies, those who are motivated by the sharp end of More ❯

high-pressure situations while working alongside traders, developers and other engineering teams Strong problem-solving skills and the ability to troubleshoot technical issues under pressure Knowledge of Linux / Unix environments Experience with scripting languages such as Python and Bash for automation tasks Ability to devise complex SQL database queries and updates Basic networking knowledge, including multicast, TCP / IP, DNS, DHCP and common network troubleshooting tools The environment is that of Facebook or Google, relaxed open with time to think and make the right decisions. The atmosphere is calm and relaxed with an open dress code. This is a role for techies, those who are motivated by the sharp end of More ❯

technical and non-technical audiences. Desirable Skills Candidates who stand out will also bring: Proficiency in Infrastructure as Code (IaC) tools such as Terraform, and experience with CI / CD pipelines and scripting languages (Bash, Python, Perl). A solid grasp of cloud security best practices and tools, including IAM, firewalls, and encryption. Experience managing hybrid and multi … cloud networking (TCP / IP, subnets, load balancing, DNS). A track record of leading small technical teams, providing guidance and mentorship. Experience in site reliability engineering (SRE) or IT operations, including incident response and troubleshooting. Strong problem-solving and innovation skills, with evidence of delivering technical improvements or new ways of working. More ❯

technical and non-technical audiences. Desirable Skills Candidates who stand out will also bring: Proficiency in Infrastructure as Code (IaC) tools such as Terraform, and experience with CI / CD pipelines and scripting languages (Bash, Python, Perl). A solid grasp of cloud security best practices and tools, including IAM, firewalls, and encryption. Experience managing hybrid and multi … cloud networking (TCP / IP, subnets, load balancing, DNS). A track record of leading small technical teams, providing guidance and mentorship. Experience in site reliability engineering (SRE) or IT operations, including incident response and troubleshooting. Strong problem-solving and innovation skills, with evidence of delivering technical improvements or new ways of working. More ❯

projects, including procurement, budgeting and security assessments Build manage and mentor a high performing network function Deep understanding of Juniper and Cisco networks. Deep understanding of Windows server, TCP / IP, routing, SANS, Active directory, firewalls and system monitoring proven experience designing and managing resilient secure and high availability network environments supporting internal and … customer services strong grasp of network security best practices and technologies including firewalls, segmentation, intrusion detection / prevention and encryption. More ❯

projects, including procurement, budgeting and security assessments Build manage and mentor a high performing network function Deep understanding of Juniper and Cisco networks. Deep understanding of Windows server, TCP / IP, routing, SANS, Active directory, firewalls and system monitoring proven experience designing and managing resilient secure and high availability network environments supporting internal and … customer services strong grasp of network security best practices and technologies including firewalls, segmentation, intrusion detection / prevention and encryption. More ❯

excellence directly drives business performance. Key Responsibilities: Design and develop reliable internal platforms and automation tools supporting trading and research functions. Improve developer productivity through build systems, CI / CD pipelines, and self-service tooling. Enhance monitoring, alerting, and workflow systems to ensure operational resilience. Collaborate across teams to deliver efficient, scalable infrastructure solutions. Ideal Background: Strong programming … ability in GoLang, C++ or Python. Excellent understanding of Linux systems and TCP / IP networking fundamentals. Experience building automation or internal developer tools adopted across teams. Familiarity with CI / CD processes, Git, and modern development workflows. Exposure to technologies such as Docker, Terraform, or scripting for infrastructure management is a More ❯

excellence directly drives business performance. Key Responsibilities: Design and develop reliable internal platforms and automation tools supporting trading and research functions. Improve developer productivity through build systems, CI / CD pipelines, and self-service tooling. Enhance monitoring, alerting, and workflow systems to ensure operational resilience. Collaborate across teams to deliver efficient, scalable infrastructure solutions. Ideal Background: Strong programming … ability in GoLang, C++ or Python. Excellent understanding of Linux systems and TCP / IP networking fundamentals. Experience building automation or internal developer tools adopted across teams. Familiarity with CI / CD processes, Git, and modern development workflows. Exposure to technologies such as Docker, Terraform, or scripting for infrastructure management is a More ❯

Fabric’s would be useful including automation and scripting. ISE NAC and monitoring tools such as Solarwinds. Solid understanding of network fundamentals: This includes knowledge of network protocols (TCP / IP, BGP, OSPF), different network devices (routers, switches, firewalls), and network architectures (LAN, WAN, WLAN). Network device configuration: The ability to configure routers More ❯

Fabric’s would be useful including automation and scripting. ISE NAC and monitoring tools such as Solarwinds. Solid understanding of network fundamentals: This includes knowledge of network protocols (TCP / IP, BGP, OSPF), different network devices (routers, switches, firewalls), and network architectures (LAN, WAN, WLAN). Network device configuration: The ability to configure routers More ❯

to £60,000 plus £5,000 bonus, benefits, perks, and healthcare options Location: London (Hybrid – 2 to 3 days in office) Type: Full-time | Permanent Client: MSP / Tech Consulting Business Are you a technically-minded professional with a passion for networks, cybersecurity, and innovative IT solutions? We’re looking for an experienced Technical Account Executive to join … Responsibilities: Act as a trusted technical advisor to sales and solution teams from early-stage engagement. Qualify opportunities from both a technical and commercial perspective. Respond to RFPs / tenders with technical and commercial insight. Architect and propose validated designs that align with customer needs. Deliver compelling presentations and product demonstrations (both in-person and remote). Maintain … for ways to improve how we work and deliver value. What We’re Looking For Experience in the managed IT or telecoms sector. Solid knowledge of network principles (TCP / IP, routing protocols like OSPF & BGP, VRRP). Understanding of security concepts: firewalls, UTM, IPSec, SIEM, etc. Hands-on experience with at least two More ❯

to £60,000 plus £5,000 bonus, benefits, perks, and healthcare options Location: London (Hybrid – 2 to 3 days in office) Type: Full-time | Permanent Client: MSP / Tech Consulting Business Are you a technically-minded professional with a passion for networks, cybersecurity, and innovative IT solutions? We’re looking for an experienced Technical Account Executive to join … Responsibilities: Act as a trusted technical advisor to sales and solution teams from early-stage engagement. Qualify opportunities from both a technical and commercial perspective. Respond to RFPs / tenders with technical and commercial insight. Architect and propose validated designs that align with customer needs. Deliver compelling presentations and product demonstrations (both in-person and remote). Maintain … for ways to improve how we work and deliver value. What We’re Looking For Experience in the managed IT or telecoms sector. Solid knowledge of network principles (TCP / IP, routing protocols like OSPF & BGP, VRRP). Understanding of security concepts: firewalls, UTM, IPSec, SIEM, etc. Hands-on experience with at least two More ❯