1 to 25 of 31 TCP/IP Jobs in the City of London

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 … 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 ...

/ 3rd Line Support Analyst, Windows, Linux, Networking This is a broad and varied role so ideal candidates have 1st to 3rd Line experience with some Network Engineering and whilst not essential previous Application Support and Financial / Banking would be beneficial. A superb opportunity, working … dynamic Financial environment and will best suit a motivated individual with the right attitude / aptitude and excellent communication skills, able to deal with users at all levels on the phone, via e-mail and face to face. You will work alongside a range of end users’ acting ...

Location- London, UK Job Type- Remote Full time Employment - Fixed term contract (12 month) Job Description: Responsibilities: Configuration and administration of IBM z / OS mainframe network software. Configuration and administration of network related 3rd party system software. Provision of technical support for Mainframe Networking issues during … other file transfer products Session Management products eg. TPX, Teleview, CL / Supersession Network Management products eg. NETVIEW, Netmaster / TCPIP Print server products eg. VPS Must be a self-starter, but also a completer / finisher who ensures that tasks / ...

strengths to improve productivity and engagement, ensuring everyone can contribute effectively. Skills and experience required Extensive experience managingAV, lighting, staging,and conference call / video requirements for large conferences and events, with experience of managing and coordinating a team. Skilled in operating tiered lecture theatres and large flat … Abilityto operate to established AV and Venue operating procedures and methods. Proficient in a range of AV hardware, including video switchers (Analog Way / Roland), audio mixers (Yamaha / Allen and Heath),wireless microphones (Shure),DSPs (BSS / QSC / ...

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 ...

Linux Systems Administrator - Intermediate - Financial / Banking Working in a busy and vibrant Financial / Banking environment, candidates will have a minimum of 2+ years Red Hat Linux systems Administration with some Scripting - Bash / Python - and ideally some SQL / Database … learn new skills. Responsibilities and Duties Monitor and support live trading platforms during operational hours. Participate in a support rota of early / late shifts supporting exchange hours 7am - 6.30pm to provide 1st and 2nd line support for IT infrastructure. Responsible to log, categorise, and prioritise ...

high-availability environment Producing clear documentation and contributing to operational best practice Required Experience Strong hands-on experience as a Windows Engineer / Infrastructure Engineer Deep knowledge of Windows Server (2016 / 2019 / 2022) Active Directory experience PowerShell exposure for automation and administration … Experience with patching, monitoring, and server lifecycle management Solid understanding of networking fundamentals (DNS, TCP / IP, authentication flows) Experience operating in high-availability or business-critical environments Comfortable working closely with both technical teams and business stakeholders Bonus: Azure, Pure Storage, VMware ...

C++ Software Engineer / Developer (Windows C / C++, C#) London to £70k FTC Are you a skilled C++ Software Engineer looking for a new opportunity? You could be progressing your career in a senior, hands-on role at a global market data provider whilst enjoying … with C++ and C# deploying to AWS and requires high scalability and low latency - they currently handle 40 billion messages per day. Location / WFH: You'll join colleagues in the City office three days a week with flexibility to work from home the other two days. Please ...

essential; proven hands-on experience and delivery record valued. Technical Capabilities: Experience with SIEM platforms (e.g. Rapid7), Email Security and Data Security / DLP solutions (e.g. Varonis). Strong knowledge of Entra ID security features including Conditional Access and PIM, plus familiarity with PAM tools including BeyondTrust, Osirium … Okta. Solid networking fundamentals (TCP / IP, DNS, firewalls, proxies, SSL / TLS) and vulnerability management experience (Qualys / Rapid7 preferred). Cloud security experience across Azure and / or AWS. Scripting skills in Python and / ...

outcomes rather than process for process’ sake. Required Experience Strong experience supporting both Windows and Linux server environments Solid networking fundamentals (LAN / WAN, TCP / IP, routing, firewalls) Exposure to infrastructure security principles and controls Virtualisation experience, ideally VMware Familiarity with … enterprise storage platforms Minimum 5 years’ experience in infrastructure / systems engineering roles Recent experience within financial services or similar high-availability environments Comfortable operating as a hands-on infrastructure generalist ...

delivering highly scalable infrastructure and pipelines. This company likes to give responsibility out, so you will be involved in decision making on tech / projects and having a real influence on the product. Working to a fully remote setup, the team are based across the UK and meet … London one a year for a social get together. Requirements: You have a strong knowledge of Azure / Azure DevOps You have experience with Kubernetes, AKS would also be great but you can pick this up on the job You have a good knowledge of IaC principles, they ...

Connectivity Analyst Contract (6 Months) London / Hybrid Financial Services Client IR35: Inside IR35 Overview A leading financial services client is looking for an experienced FIX Connectivity Analyst to support their Global Markets Electronic Trading Infrastructure team. This is a hands-on contract role focused on FIX onboarding … Responsibilities Onboard institutional clients and vendors to FIX trading platforms Configure and certify FIX sessions across UAT and Production Support FIX 4.2 / 4.4 / 5.0 message flows Monitor and troubleshoot live FIX sessions (sequence gaps, rejects, drops) Work with Network and Infrastructure teams on VPNs ...

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, UDP, Unicast, and Multicast Familiarity with HFT techniques such as lock-less queues and circular buffers Experience with messaging architectures (e.g., Solace, 29West, ActiveMQ) In-depth knowledge of in-memory data management, data structures, and optimization techniques Understanding of NUMA architecture and NUMA-aware programming ...

including advanced configuration and policy design. Strong understanding of Zero Trust architecture , secure web gateways, and cloud security principles. Expertise in networking protocols (TCP / IP, DNS, HTTP / HTTPS), VPN technologies, and identity integration (SAML, OAuth, LDAP). Familiarity with firewall … with the ability to explain technical concepts to varied audiences and uplift team capability. Desirable Attributes Relevant certifications such as Zscaler ZCCA-IA / ZCCA-PA , CCNP, CISSP, or cloud certifications (Azure, AWS). Experience in large-scale or global enterprise environments. Strong documentation, governance, and continuous improvement ...

team’s success. Role Responsibilities: Monitor the Helpdesk platform to ensure tickets are assigned appropriately, resolved timely, SLAs are met, and weekly / monthly reports are prepared. Serve as the first point of contact for end users seeking technical assistance via phone, email, chat, or ticketing system. Install … with onboarding and offboarding of employees (equipment setup, access provisioning, etc.). Support IT procurement activities Liaise with internal resources and third parties / vendors for the execution of projects. Triage Helpdesk and Service requests and escalate more technically challenging issues / problems to senior team ...

Deliver white-glove IT support to executive stakeholders, handling sensitive issues with discretion, urgency, and professionalism. Desktop & End-User Expertise: Provide Level 2 / 3 support across Windows 10 / 11, iOS, and enterprise productivity tools. Ensure consistent, high-performance user experiences for laptops, desktops, mobiles … Maintain hybrid environments across Windows Server, VMware, and Azure. Oversee performance monitoring, patching, cost management, backups, and disaster recovery processes. Network & Connectivity: Troubleshoot TCP / IP, DNS, DHCP, VPNs, SD-WAN, and remote access solutions, ensuring maximum uptime for both on-site and remote ...

Systems Administrator, or in a similar role, with a focus on both on-premise and cloud-based environments. Strong knowledge of networking concepts (TCP / IP, DNS, VPNs, firewalls) and experience configuring and managing network devices. Expertise in virtualisation technologies (e.g., VMware, Hyper … Windows and Linux server administration, including scripting and automation (e.g., PowerShell, Python, Bash). Experience with storage solutions (SAN, NAS) and backup / recovery systems. Strong understanding of IT security principles, including firewalls, intrusion detection / prevention, and encryption. Familiarity with DevOps practices and tools such ...

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 … 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 ...

support IoT service platforms Manage the full lifecycle for provided equipment and services Take responsibility for ICT services operations including 1 3 / 12 networks firewalls security services SD Detailed planning, designing and developing of ICT services including network and server applications Network element configuration including … Networking with knowledge of CCNP, JNCIA Proficiency in TCP / IP, IPv4, IPv6, Ethernet, Data Transmission, L2 / L3 VPN, Multi-Layer Networking, QoS, Security Firewall, SDWAN, EVPN-VXLAN, and IPSec Knowledge of SONET / SDH, Ethernet, MPLS, Optical ...

Experience: Proven Experience in Managed Services: Demonstrated ability to support multiple clients within a B2B environment In-depth knowledge of networking protocols (TCP / IP, DNS, DHCP) and configurations (VLANs, VPNs, firewalls) ITIL Framework Proficiency: Practical application of ITIL principles to streamline IT operations … Intune, Autopilot Advanced Troubleshooting: Expert-level troubleshooting skills for Microsoft Server and Desktop Operating Systems Virtualization and Backup: Experience with Hyper-V and / or VMware virtualization environments Knowledge of enterprise backup and recovery solutions Security-Focused: Strong understanding of security best practices and their implementation ...

issues to ensure high availability Configure and manage routers, switches, firewalls, and load balancers Implement and maintain network security measures, including firewalls, IDS / IPS, and access controls Perform network upgrades, patches, and capacity planning Document network configurations, procedures, and diagrams Collaborate with systems, security, and cloud teams … support IT initiatives Provide tier 2 / 3 network support and participate in on-call rotations as required Ensure compliance with company policies and industry best practices Required Qualifications Bachelor’s degree in Computer Science, Information Technology, or related field (or equivalent experience) 5+ years of experience ...

network engineering or infrastructure roles, ideally at a junior-to-mid level (3+ years) A strong grounding in core networking concepts, including TCP / IP, routing and switching, and common L2 / L3 protocols (e.g. BGP, OSPF) Hands-on exposure to enterprise … coverage and flexibility around non-compete timelines where applicable (Preferred) Experience with cloud networking in AWS, Azure, or GCP (Preferred) Familiarity with CI / CD-driven infrastructure workflows or network monitoring platforms ... ...

environments. Troubleshoot hardware, software, and network issues. Manage user accounts and groups in Active Directory. Support mobile devices (iOS, Android), printers, and Citrix / remote access systems. Coordinate with vendors and building personnel for installations and onsite services. Assist with onboarding / offboarding, including equipment setup … support experience. Strong experience with Windows and macOS imaging and endpoint management. Proficiency in Microsoft Active Directory and enterprise network troubleshooting (LAN, DNS, TCP / IP, Wi-Fi). Familiarity with remote access tools and Citrix environments. Excellent communication and customer service skills. Preferred ...

during pre-sales engagements Participate in customer workshops, meetings, and proof-of-concepts Translate business requirements into technical designs and proposals Support RFP / RFI responses and solution documentation Present solutions to both technical and executive stakeholders Vendor & Practice Development Maintain deep expertise in one or more … years’ experience in enterprise networking with a strong WAN focus 3+ years’ hands-on SD-WAN design and deployment experience Strong knowledge of TCP / IP, routing and switching (BGP, OSPF, VLANs) Solid experience with VPNs (IPsec, GRE), QoS, and application performance Background ...

teams to ensure seamless integration. Implement and maintain robust network security across all environments. Skills required for the Senior Network Engineer: CCNA and / or CCNP certified. Strong networking expertise: TCP / IP, BGP, OSPF, EIGRP. Hands-on experience with multicasting. Solid ...