Senior Network Engineer

iO Associates; London; On-site; GBP 70,000 - 80,000; Full time

Job summary

Join a forward-thinking IT solutions consultancy as a Senior Networking Engineer, where you'll work on cutting-edge data center technologies. This role offers the chance to design and support high-performance networks in fast-paced, low-latency environments, particularly for financial services. If you're passionate about network automation and next-gen technologies, this position will allow you to thrive while making impactful contributions to global trading infrastructures. Embrace this opportunity to advance your career in a dynamic and innovative setting.

Qualifications

• CCNP-level qualification or equivalent real-world expertise required.
• Hands-on experience with Cisco IOS-XR, Cisco NX-OS, and/or Arista EOS.

Responsibilities

• Designing, building, and supporting high-performance network solutions.
• Deploying networks in low latency for financial trading environments.

Skills

CCNP-level qualification

Routing knowledge (BGP)

Cisco IOS-XR

Cisco NX-OS

Arista EOS

Network automation (Ansible, Python, Jinja2, Git, Terraform, Jenkins)

WAN technologies

Optical networking

Fibre waves

Network security principles (VPNs, QoS)

Tools

Ansible

Python

Jinja2

Git

Terraform

Jenkins

Job description

Senior Networking Engineer

Permanent

£70,000 - £80,000 per annum

4 days a week on site in London

I am looking for a Senior Networking Engineer to join a thriving IT solutions consultancy offering the chance to work on the most exciting data centre technologies!

Currently delivering a major new data centre implementation project for a financial services client, this is a fantastic opportunity to work at the cutting edge of low-latency network design, colocation infrastructure, and network automation.

You will play a critical role in designing, building, and supporting high-performance, highly available network solutions across global trading environments. If you thrive in a fast-paced, DevOps-focused environment and have a passion for automation and next-gen technologies, this is for you.

You will need skills in:

• CCNP-level qualified or equivalent real-world expertise.

• Strong routing knowledge - especially BGP.
• Hands-on with Cisco IOS-XR, Cisco NX-OS, and/or Arista EOS.
• Proven experience deploying networks in low latency
• Proven experience in financial trading environments.
• Solid knowledge of WAN technologies, optical networking, and fibre waves.
• Proficient in network automation (Ansible, Python, Jinja2, Git, Terraform, Jenkins).
• Experience in:
• Multicast configuration and troubleshooting
• Layer 1 MUX switching
• Packet tapping and timestamping
• Network security principles (VPNs, QoS, protected/unprotected circuits)
• Comfortable working with monitoring tools, handling network migration and handover.

If this sounds like you then please share your CV with me on and we will arrange a call to discuss further