Network Engineering Specialist

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About the role

The Network Design Specialist leads the design, evolution and technical assurance of BT’s Network Cloud fabric, supporting critical Mobile, Voice, Broadband and cloud-hosted network services. The role provides expertise in IP networking, EVPN/VXLAN data centre fabrics, overlay networking, connectivity and service integration, ensuring the platform delivers future scalability, resilience, performance and operational supportability.

Acting as a senior Network Cloud design authority, the role combines network engineering, cloud infrastructure, SDN and automation expertise to drive fabric evolution, including the transition from Juniper to Cisco architectures. Working closely with tenants, platform engineering, operations and strategic vendors, the successful candidate will translate complex requirements into robust, supportable designs while establishing standards, reusable patterns, documentation, testing evidence and operational handover processes.

What you’ll be doing

• Produce high and low-level designs for the Network Cloud fabric and tenant connectivity.
• Lead Network Cloud fabric design across routing, switching, EVPN/VXLAN and overlays.
• Define and assure standard patterns for connectivity, onboarding and platform growth.
• Translate tenant requirements into scalable, repeatable and supportable solutions.
• Provide expertise in IP networking, MPLS/WAN integration, VRFs, routing policy and resilience.
• Collaborate with 21CN and WAN engineering teams to ensure robust end-to-end designs.
• Drive platform transformation, automation, lifecycle management and Cisco migration initiatives.
• Lead design reviews, technical investigations and solution option assessments.
• Assess risks, dependencies, interoperability and operational impacts of network changes.
• Establish design standards, documentation, reusable patterns and provide technical leadership to engineering, NOC teams and strategic vendors.

Essential Skills / Experience

• Expertise in large-scale IP networking, including BGP, EVPN/VXLAN, routing, switching and data-centre fabric design.
• Proven ability to lead network architecture, produce HLDs/LLDs, assess technical trade-offs and act as a technical design authority.
• High level understanding of cloud networking and network automation, including integration with cloud/NFVi platforms and software-defined networking concepts.

Desirable Skills / Experience

• Extensive experience designing and delivering large-scale IP network and data centre fabric solutions within telecoms, cloud, or critical infrastructure environments.
• Proven experience designing leaf-spine, underlay/overlay and tenant-segmented network fabrics, including large-scale transformation and vendor migrations.
• Knowledge of cloud, virtualisation and NFVi platforms, with experience integrating networking into OpenStack, OVN, KVM and related technologies.
• Ability to translate complex requirements into standardised, secure, scalable and supportable designs while assessing risks, trade-offs and operational impacts.
• Strong stakeholder, vendor and technical leadership skills, with experience producing design documentation, driving engineering best practice and mentoring teams.

Our Package

Tailored benefits make a real difference. That’s why we offer a comprehensive range to support your growth, wellbeing, and everyday life. You can design the package to suit you and your lifestyle. Your core benefits include:

• 10% on target annual bonus.
• Access to an online private GP 24/7 for you and your immediate family
• Market-leading paid carers leave with up to 2 weeks off
• Equalised maternity, paternity, and adoption leave – 18 weeks’ full pay and 8 weeks’ half pay
• Discounted EE and BT products, including mobile and broadband
• Market leading Pension scheme – 5% from you and 10% from us
• Holiday purchase scheme

You can select additional benefits, including healthcare, dental, gym memberships and more when you’re ready.

BT Group is the UK’s leading communications group and the holding company behind some of the country’s most recognised brands – including BT, EE, Openreach and Plusnet. Our purpose is as simple as it is ambitious: we connect for good. Our customers include consumers, small, medium and large businesses, public sector organisations and other communications providers.

BT Group’s role is about setting direction, unlocking value and creating the conditions for our brands and businesses to thrive.

Having come through the most capital-intensive phase of our fibre investment, our focus now is on what comes next – simplifying how we operate, using technology and AI to work smarter, and organising ourselves to serve customers better and grow sustainably. Group teams shape strategy, policy, brand, capital allocation and transformation, helping the whole organisation perform at its best.

We have a singular culture that unites all our people: we are customer-first challengers, who are committed, clear and connected. These behaviours unite us as one team to deliver for our colleagues, our customers, our stakeholders and the country. Joining BT Group means working at the heart of a business that matters to the UK, with the opportunity to shape decisions, influence outcomes and help set the future course of one of the country’s most important companies.