Core Network Engineer

Core Network Engineer

Job Description

[Up to c. $130k Comp Package | Hybrid Working]

Role Overview

We’re supporting a high-performing quantitative investment firm known for its sophisticated infrastructure and global reach. As they continue to evolve their trading and research systems, they’re hiring a Network Core Engineer to help lead the design and delivery of scalable, low-latency network infrastructure across data centre, office, and cloud environments. This role is more than keeping the lights on - it’s an opportunity to shape strategy, steer adoption of automation and telemetry, and work alongside some of the brightest minds in financial technology...

Key Responsibilities

• Architect, deploy and maintain high-availability network environments across multi-vendor data centres, offices, and cloud platforms
• Convert business needs into detailed network architecture, including topologies, capacity planning, and failover strategies
• Produce clear network documentation - diagrams, standards, and operational runbooks
• Lead and manage network projects, coordinating with vendors and internal stakeholders to drive timely delivery
• Select suitable hardware and software solutions, evaluating them against performance, scalability, and security requirements
• Propose and pilot new technologies aimed at optimising network performance, reliability, and cost-efficiency
• Guide the Network Reliability team to adopt best practices, ensuring seamless transitions from design to operations
• Provide tier‑3 support for escalated network incidents, addressing complex performance or connectivity issues
• Recommend automation opportunities and implement innovative solutions to streamline network operations

What You’ll Bring...

• 6+ years of hands-on experience in network engineering or related roles with strong delivery of complex enterprise projects
• Degree in Computer Science, Network Engineering, or a closely related discipline
• Advanced networking certifications - CCNP mandatory; CCIE is a strong advantage
• Proficiency with core networking protocols: OSPF, BGP, EVPN, VLAN/VxLAN, STP, MLAG, IGMP, PIM, QoS, HSRP/VRRP
• Experience using diagnostic and performance tools: Wireshark, netcat, tcptrace
• Demonstrated experience with Arista and Cisco platforms in data centre or campus environments
• Strong security networking experience - AAA (Radius/TACACS), device hardening, and Palo Alto or Fortinet firewalls
• Competent in cloud networking services within AWS, GCP, or Azure
• Experience with observability tools like Prometheus, Elastic Stack, CVP or Grafana
• Solid background in scripting and automation using Python, Ansible, Git
• (Preferred) Familiarity with voice platforms including Cisco Unified Communication technologies
• (Preferred) Exposure to network telemetry and monitoring protocols such as sFlow, LANZ or similar

...

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