Senior Network Engineer (IP & Mobile) - Systems Integrator

Are you a Network Engineer looking for a contract role delivering mission‑critical networking and IT infrastructure solutions?

Join a London‑based IT consultancy and services team delivering expert network design, managed services, cloud transformation, and security solutions for enterprise clients. The organization partners with businesses to architect, implement, and support high‑performance connectivity, secure hybrid environments, and resilient IT infrastructure. This remote role focuses on the IP/MPLS infrastructure that underpins the mobile packet core network, including interconnects with partner networks, enterprise APN connectivity, and Internet breakout infrastructure.

Apply now and step into a role where your skills help design, deploy and support infrastructure that empowers organisations to achieve their technology goals!

Responsibilities:

• Operate and support large-scale IP/MPLS service provider networks, ensuring high availability and performance for mobile data traffic
• Manage and optimise BGP (eBGP/iBGP) and IS-IS routing environments, including routing policy and traffic engineering
• Design and maintain external interconnects and peering (NNI) with partners, roaming providers, and enterprise networks
• Support integration between mobile packet core (EPC/PGW) and IP transport networks, including APN and Gi interface connectivity
• Troubleshoot and manage high-throughput subscriber traffic and CGNAT environments, ensuring efficient traffic flow and scalability

Required Skills/Experience:

• Strong experience operating large-scale service provider IP/MPLS networks
• Advanced knowledge of BGP (eBGP and iBGP)
• Experience operating IS-IS as an IGP within service provider environments
• Experience with VRF-based network segmentation
• Understanding of traffic engineering and routing policy design
• Strong experience operating large-scale service provider IP/MPLS networks
• Experience designing or operating NNI (Network-to-Network Interface) interconnections
• Experience managing external network interconnects and peering relationships
• Knowledge of routing policy, filtering, and traffic engineering for Interconnect environments
• Understanding of how mobile packet core gateways integrate into IP/MPLS networks
• Experience supporting routing environments around high-throughput gateway infrastructure
• Familiarity with packet core breakout points and routing design

Contract Details:

• Location: Fully Remote
• Length: 12 Months (extension potential)
• Start: ASAP

Salary:

• Rate: £550/day