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.
#J-18808-Ljbffr”, “datePosted”: “2026-03-23”, “hiringOrganization”: { “@type”: “Organization”, “name”: “iO Associates”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__391190081__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=33” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “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.
#J-18808-Ljbffr…