Senior Delivery Engineer - Arista Spine & Leaf (Inside IR35)

Job Title: Senior Delivery Engineer - Arista Spine & Leaf (Inside IR35)

Location: Ideally 1 day per week onsite in London
Contract Rate: £490 per day (Inside IR35)
Contract Type: 6months + (likely extension)

Role Overview

We are seeking a highly skilled Senior Delivery Engineer with a strong background in Arista-based Spine and Leaf network architectures to join a fast-paced technology environment, supporting mission-critical infrastructure with a focus on low-latency and high-performance networking.

You will lead and support the deployment and integration of complex network solutions based on VXLAN and EVPN, with an emphasis on multicast routing and layer 2/3 switching. The ideal candidate will have a deep understanding of capital markets/trading environments, where stability, scalability, and low-latency are paramount.

Key Responsibilities

• Design, implement, and support Arista Spine & Leaf architectures across trading platforms.

• Deploy and manage VXLAN/EVPN overlays, ensuring high availability and optimal performance.

• Configure and troubleshoot multicast networking for Real Time data distribution.

• Deliver complex routing and switching configurations across data center and campus environments.

• Collaborate with internal stakeholders (network architects, traders, systems engineers) to ensure seamless infrastructure delivery.

• Maintain documentation and provide detailed handovers to operations teams.

• Participate in change control, incident management, and root cause analysis processes.

Key Skills and Experience

Mandatory:

• Deep experience with Arista Networks, particularly Spine and Leaf architectures.

• Proficiency in VXLAN and EVPN configuration and troubleshooting.

• Strong multicast networking skills (PIM, IGMP, MSDP).

• High-level understanding and hands-on delivery of routing (BGP, OSPF, ISIS) and switching (L2/L3).

• Background in capital markets or trading environments, understanding the criticality of low-latency and high-reliability infrastructure.

Desirable:

• Exposure to automation tools (Python, Ansible) is a plus.

• Experience with network telemetry and monitoring systems.

• Arista certification (eg, ACE) highly desirable.

Work Environment

• Hybrid: 1 day a week onsite in London, remainder remote.

• Dynamic, high-stakes setting within capital markets/trading environments.

• Working with cutting-edge technology stacks and financial trading systems.