Senior Network Architect — ISP Backbone & Migration Lead

Entanet; Oakengates; On-site; GBP 80,000 - 90,000; Full time

Benefits offered by this job

Competitive base salary

Generous holiday allowance

Flexible working arrangements

Supportive, inclusive culture

Job summary

Entanet is seeking a Network Architect to own architecture, design and documentation of the network as Entanet separates from CityFibre. You will lead architectural workstreams for TSA migrations, IP resource transfers, and backhaul rationalisation, while guiding a team of engineers across multiple sites.

You will translate business needs into robust designs for Ethernet, broadband, PWAN and colocation, with hands-on governance of HLD/LLD and routing policy.

Qualifications

• Proven experience designing and documenting carrier or ISP networks at architecture level.
• Strong working knowledge of BGP, IS-IS, MPLS and IP transit/peering across a multi-site backbone.
• Experience producing HLD/LLD and governing IP addressing and routing strategy.
• Understanding of Ethernet, broadband, PWAN, security and colocation products and the supplier landscape.
• Excellent technical documentation and diagramming ability.
• Strong analytical and problem-solving skills with the ability to assess trade-offs across cost, resilience and capacity.

Responsibilities

• Lead TSA network migrations workstreams and establish Entanet as an independent network from CityFibre.
• Lead RIPE LIR and IP resource migration from CityFibre to Entanet.
• Lead IPAM replacement and migration from CityFibre’s NetBox.
• Lead colocation, backhaul and network equipment rationalisation across 27 sites.
• Design and document network topology, IP addressing strategy and routing policy across core and customer estate.
• Produce HLD/LLD for all network changes and new products.
• Architect L2TP broadband product migration and onboarding of CityFibre BFTTP.
• Interface with and support Systems Infrastructure Engineer on related systems.
• Architect network products as APIs for portal consumption with automation.
• Use AI-assisted tooling to accelerate diagrams, capacity modelling, HLD/LLD authoring and vendor comparison.
• Collaborate with Network Engineers who will implement LLDs and BAU activities.
• Act as escalation point within the network team and be available on-call.
• Travel to data centres and POPs as needed.

Skills

BGP/IS-IS/MPLS

Network architecture

Documentation & diagrams

AI-assisted design

Education

CCNP/CCIE or equivalent

Tools

NetBox

RADIUS

SYSLOG

DNS

Job description

Entanet is seeking a Network Architect to own architecture, design and documentation of the network as Entanet separates from CityFibre. You will lead architectural workstreams for TSA migrations, IP resource transfers, and backhaul rationalisation, while guiding a team of engineers across multiple sites.

You will translate business needs into robust designs for Ethernet, broadband, PWAN and colocation, with hands-on governance of HLD/LLD and routing policy.