Network Architect

entanet; Telford; On-site; GBP 80,000 - 90,000; Full time

Benefits offered by this job

Competitive base salary

Flexible working arrangements

Generous holiday allowance

Job summary

Entanet is seeking an experienced Network Architect to own the architecture, design and documentation of our ISP network as we stand up as an independent B2B aggregation network.

You will lead a small team, drive TSA migration workstreams, IP resource migration, and network re-platforming across multiple sites, with a focus on robust, well-documented designs.

The role combines architectural leadership with hands-on engineering and cross-functional collaboration.

Qualifications

• Right to work in the UK.
• Full UK driving licence.

Responsibilities

• Lead TSA migrations workstreams to establish Entanet as an independent network from CityFibre.
• Lead RIPE LIR and database administration, and IP resource migration.
• Lead IPAM replacement and migration from CityFibre’s NetBox.
• Lead colocation, backhaul and network equipment rationalisation across 27 sites.
• Lead architecture to separate Entanet’s eBGP and separation from CityFibre’s network.
• Design and document network topology, IP addressing strategy and routing policy.

Skills

BGP

IS-IS

MPLS

IP transit

IP addressing

Routing policy

HLD/LLD

Network design

Automation APIs

Documentation

Tools

NetBox

RIPE Database

NMS

Job description

Salary: £80,000-90,000

Hours: 37.5 hours per week, 9am-5.30pm Monday to Friday

Work pattern: Office Based, Telford

About The Role

Our Network Architects own the architecture, design and documentation of the Entanet ISP network as it separates from CityFibre and stands up as an independent B2B aggregation network. You will be part of a team of two architects and lead the network architectural workstreams underpinning TSA migration, colocation and backhaul rationalisation, and broadband re-platforming. You shall also lead and support a team of network engineers who help execute workstreams. Beyond the network separation, this role translates business and product requirements into robust, well-documented network designs across Ethernet, broadband, PWAN and colocation.

Key Responsibilities

• Lead Transitional Service Agreement (TSA) network migrations workstreams, and the tasks required to establish Entanet as an independent network from CityFibre.
• Lead on RIPE LIR and database administration, and the migration of IP resources from CityFibre to Entanet.
• Lead IPAM replacement and migration from CityFibre’s NetBox.
• Lead colocation, backhaul and network equipment rationalisation assessments – planning and leading optimisation across the 27 colocation sites (BT exchanges & data centres) and backhaul estate.
• Lead architecture to separate Entanet’s eBGP and separation from CityFibre’s network.
• Design and document network topology, IP addressing strategy and routing policy (BGP/MPLS/IS-IS) across the core and customer-facing estate.
• Produce HLD/LLD for all network changes and new products, maintaining a clear architectural baseline for the business.
• Lead architecture of the L2TP broadband product, including migration from BTW to PXC, as well as onboarding CityFibre BFTTP.
• Interface with, provide requirements into and support the Systems Infrastructure Engineer on network-related systems (e.g. NMS, RADIUS, SYSLOG, DNS).
• Support ‘coding the business’ by architecting network products as APIs that portals can consume, with high levels of automation.
• Use AI-assisted architecture tooling to accelerate diagram production, capacity modelling, HLD/LLD authoring, configuration generation and vendor comparison analysis.
• Lead and collaborate with Network Engineers who will lead implementation efforts of LLDs and other BAU network activities.
• Act as the highest level of escalation within the network team (Tech Support, NOC, Network Engineers) and available to work to an on-call rota.
• Travel to data centres, exchange and other Points of Presence may be required from time-to-time as part of your role. Break-fix and general maintenance visits will be outsourced.

About You

• Proven experience designing and documenting carrier or ISP networks at architecture level, distinct from operational NOC delivery.
• 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 (carriers, backhaul providers, colocation).
• Excellent technical documentation and diagramming ability.
• Strong analytical and problem-solving skills with the ability to assess trade-offs across cost, resilience and capacity.
• Able to work across product lines and balance competing architectural priorities.
• Comfortable adopting AI-assisted tooling to accelerate design and analysis.

It would be great if you have any of the following, but it's not essential:

• Experience of a network separation, carve-out or large-scale migration programme.
• Given Entanet’s current estate, strong familiarity with Cisco ASR routers, and Nexus & Catalyst switches would be beneficial.
• Relevant networking certification (e.g. CCNP/CCIE, JNCIP/E-SP, or equivalent) desirable.
• Exposure to PXC / wholesale broadband platforms (BTW, Giacom), CityFibre and Openreach products.
• Experience exposing network services as APIs for portal/automation consumption.

Qualifications

• Right to work in the UK.
• Full UK driving licence.

What We Offer

• Competitive base salary.
• Generous holiday allowance and flexible working arrangements.
• Supportive, inclusive culture with and cross-functional collaboration.

We are committed to equality of opportunity and welcome applications from candidates of all backgrounds. If you require any reasonable adjustments during the recruitment process, please let us know.