Senior Network Engineer

🔒 Confidential Employer
Posted 24 March 2026
LOCATION
London
TYPE
Full-time
LEVEL
Mid-Senior level
CATEGORY
Technology
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

BGP OSPF VLANs STP QoS Routing Switching Automation

FULL DESCRIPTION

Senior Network Engineer

Responsible for the design and implementation of low-latency network projects within client data centre environments across multiple exchanges for a market leading FS Firm.

What you'll be doing:

  • You’ll be with working in a complex, multi-vendor environment, ideally including Cisco and Arista platforms.
  • Working in a co-location (Co-Lo) or data centre environment, including hands-on rack-and-stack, cross-connects and vendor coordination.
  • Design, build, and support high-performance, low-latency network infrastructure within colocation environments.
  • Maintain and evolve global WAN and cloud connectivity solutions.
  • Configure and troubleshoot multicast and low-latency network environments.
  • Implement and support timing solutions (GPS, PTP, NTP, PPS).
  • Deploy and manage packet capture and monitoring solutions; perform packet analysis.
  • Support exchange colocation connectivity for market data and order entry.
  • Drive automation using modern tooling and scripting.

What you'll bring:

  • Strong hands-on experience with routing and switching in a complex, multi-vendor environment
  • Solid understanding of core networking concepts including BGP, OSPF, VLANs, STP, QoS and troubleshooting at Layer 2/3.
  • Previous exposure working in a CoLo Environment
  • Previous experience with Automation

What you’ll gain:

Here at OpticoreIT we believe in investing in our team as we understand that we are only as great as our engineers, so learning and development is a big deal for us. Whether you’re going for a CCNP, CCIE, Hashicorp, Python, Cloud Technology or anything in between [Employer hidden — view at passion-project.co.uk] has your back with all our training, labs, courses, and shared knowledge and the most important part it’s all free! On top of that, we also give you:

  • Competitive Salary & discretionary bonus
  • 23 days holiday + bank holidays
  • Private healthcare & dental
  • Pension
  • EV car, workplace nursery, tech, and cycle-to-work salary sacrifice schemes
  • Team & Company Social events
  • EMI share scheme
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