Network Security Engineer

NineTech; London; Hybrid; GBP 80,000; Full time

Job summary

A leading company in the financial services sector is seeking a skilled Network & Security Engineer for a permanent opportunity with a salary of up to £80,000. As part of a hybrid working arrangement, you'll be responsible for the design, implementation, and support of robust network infrastructure. Key tasks include configuring Palo Alto firewalls and optimizing multicast routing across multiple environments. Ideal candidates will have experience in low-latency trading networks and a strong understanding of enterprise routing principles.

Qualifications

• Deep hands-on experience with multicast routing in high-throughput environments.
• Strong knowledge of BGP and enterprise routing best practices.
• Proficiency in managing Aruba and Arista switch infrastructure.

Responsibilities

• Design and implement network infrastructure across global sites.
• Support BGP peering and optimize for low-latency trading.
• Monitor and optimize network performance on critical links.

Skills

Multicast routing

BGP

Palo Alto Networks firewalls

GlobalProtect VPN

ZScaler ZIA/ZPA

VMware SD-WAN

Network automation

Troubleshooting

Tools

Arista switches

Aruba switches

Job description

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Base pay range

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Network & Security Engineer – Financial Services – £80k + Hybrid (Central London)

Permanent | Hybrid (2-3 days in Central London)

Our client, a leading player in the financial services sector, is seeking a skilled Network & Security Engineer to join their growing team. This is a permanent opportunity offering up to £80,000, with hybrid working arrangements based in Central London.

Key Responsibilities

• Design, implement, and support robust network infrastructure across multiple global sites.
• Manage multicast routing for market data distribution across complex environments involving multiple VRFs and VLANs.
• Configure and maintain Aruba (Access/Distribution) and Arista (Core/Low-Latency) switches.
• Support BGP peering, route filtering, and optimisation for ultra-low-latency trading environments.
• Operate and maintain Palo Alto firewalls, GlobalProtect VPNs, and ZScaler security platforms (ZIA/ZPA).
• Support VMware SD-WAN (VeloCloud) deployments across branch and remote trading locations.
• Monitor and optimise network performance (latency, throughput, availability) on critical links.
• Assist with network automation initiatives and maintain accurate documentation.

Required Skills & Experience

• Deep hands-on experience with multicast routing in high-throughput environments.
• Strong knowledge of BGP, enterprise routing, and switching best practices.
• Proficiency in managing Aruba and Arista switch infrastructure.
• Prior experience supporting low-latency trading networks or other performance-sensitive environments.
• Expertise in configuring and maintaining Palo Alto Networks firewalls and GlobalProtect VPN.
• Familiarity with ZScaler ZIA/ZPA and securing global internet egress traffic.
• Experience with VMware SD-WAN (VeloCloud) or comparable SD-WAN solutions.
• Ability to diagnose and troubleshoot complex network issues across all layers of the OSI model.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Information Technology

• Industries

  Staffing and Recruiting

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