Senior Network Engineer
Summary
Senior (L3) Network Engineer on a 12-month hybrid contract in Central London (3 days onsite), supporting IoT deployments in a Financial Services environment. Hands-on Cisco/Arista routing and switching — OSPF, VLANs, ACLs, multicast — plus packet-capture troubleshooting under CAB change control, with some Saturday change windows. Inside IR35 via umbrella.
Salary: £124,800 - 128,960 per year
Requirements:- 8-10 years Network Engineering experience at Senior/L3 level
- Strong Cisco and Arista routing and switching experience
- Excellent knowledge of OSPF, VLANs, routing, and ACLs
- Experience supporting IoT connectivity from a network infrastructure perspective
- Strong multicast configuration and troubleshooting experience
- Advanced network troubleshooting experience, including packet capture and root cause analysis
- Recent experience working within Financial Services
- Strong understanding of CAB/change control processes
- CCNP required; CCIE highly desirable
- Excellent communication and stakeholder management skills
- Availability to support Saturday network change windows
- Join a major network infrastructure programme supporting IoT deployments within a Financial Services environment
- Provide senior-level network engineering support for routing, switching, and connectivity issues
- Configure and troubleshoot multicast, OSPF, VLANs, routing, and ACLs
- Support network troubleshooting activities, including packet capture and root cause analysis
- Work within CAB and change control processes
- Support scheduled change windows, including Saturday work as required
- Cisco
- IoT
- Support
- Network
- Windows
More:
We are hiring on a 12-month contract for a Senior Network Engineer (L3) in a hybrid London role, with three days per week on site and some Saturday work required for scheduled change windows. This is a hands-on opportunity to join a major network infrastructure programme supporting IoT deployments in a Financial Services environment. The rate is £60-£62 per hour, deemed inside IR35 via umbrella, and the start date is ASAP following completion of background checks.
last updated 39 week of 2026