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Senior Network Engineer

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: iO Associates
Full Time position
Listed on 2026-03-23
Job specializations:
  • IT/Tech
    Network Engineer, Systems Engineer
Salary/Wage Range or Industry Benchmark: 80000 - 100000 GBP Yearly GBP 80000.00 100000.00 YEAR
Job Description & How to Apply Below
Location: Greater London

Senior Network Engineer is required to work for a world-leading quantitative research and technology firm operating at the cutting edge of financial markets. They specialise in building high-performance, ultra-low latency systems that process vast amounts of real-time data to power automated trading strategies. With a strong focus on innovation and automation, they operate one of the most advanced and sophisticated network infrastructures in the industry.

You will be responsible for designing, building, and supporting low-latency network infrastructure in colocation environments, working across multi-vendor platforms such as Cisco and Arista. This includes hands‑on data centre work, maintaining global WAN and cloud connectivity, troubleshooting multicast and low-latency networks, implementing timing solutions, and managing monitoring tools. You will also support exchange connectivity, drive network automation, and collaborate with teams to enhance performance and reliability.

Required

Skills
  • Strong hands‑on experience in routing & switching within complex, multi-vendor environments (Cisco/Arista)
  • Strong understanding of networking fundamentals: BGP, OSPF, VLANs, STP, QoS (Layer 2/3)
  • Working experience in Co-Lo / Data Centre environments
  • Firewall knowledge (Fortinet preferred)
  • Exposure to automation

If you're ready to take on a high-impact role in a cutting‑edge environment, apply now to be part of a team driving next‑generation network innovation.


* PS:
The Company can't provide any sponsorship, so only candidates with the existing right to work in the UK will be considered for this role.

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Position Requirements
10+ Years work experience
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