Network Engineer - Financial Services (Inside IR35)

Location: Remote with flexibility to go onsite
Rate: £480 per day (Inside IR35, all-inclusive)
Contract:

• Initial contract until March 2026

• 6-month renewal thereafter (annual funding approved, released in 6-month cycles)

Overview

We are seeking a Contract Network Engineer to join a high-performance capital markets infrastructure environment, supporting the core networks that underpin trading platforms, market data distribution, and exchange connectivity.

This is a delivery-focused role, operating within an in-house data centre and infrastructure estate where availability, latency, and resilience are critical. You will be responsible for translating project and business requirements into Low-Level Designs (LLDs) and implementing those designs end-to-end.

Key Responsibilities

• Deliver network projects and changes within a capital markets/trading environment

• Translate business and project requirements into:

  • Low-Level Designs (LLDs)

  • Implemented, tested, and deployed network solutions

• Design, build, and support large-scale Arista routing & switching environments

• Support and troubleshoot multicast market data feeds delivered to internal and external consumers

• Configure and support F5 load balancing in a dedicated F5 environment

• Use Arista CloudVision for network management and visibility

• Implement and support Firewall platforms, primarily Fortinet

  • Palo Alto exposure is an added bonus

• Perform advanced troubleshooting and root-cause analysis across complex network issues

• Collaborate closely with infrastructure, application, and trading teams

Required Skills & Experience

• Proven experience as a Network Engineer in low-latency, mission-critical environments

• Multicast networking (essential)

• Arista Networks - routing and switching at scale

• Firewall technologies

  • Fortinet (hands-on, essential)

  • Palo Alto (desirable)

• F5 Load Balancing (hands-on experience required)

• Experience with Arista CloudVision

• Strong experience producing and delivering Low-Level Designs (LLDs)

• Excellent troubleshooting and problem-solving skills

• CCNP-level knowledge (certification preferred, not mandatory)

Environment

• Capital markets/trading platforms

• In-house data centre and infrastructure environment

• Performance-sensitive, high-availability networks

Additional Information

• Inside IR35

• £480 per day, all-inclusive

• Contract funded through March 2026, with expected 6-month extension