Senior Network Design engineer

• Elicit business and technical requirements working with the various stakeholders during requirements gathering phase.

• Author both high level and low-level design documents to support Telco services including presenting such designs for internal technical and stakeholder sign off.

• Perform audit, analysis and propose solutions for migrating from one platform or design to another, providing support for testing and fulfilment teams.

• Own software/hardware selection, perform bug scrubs and security vulnerability assessments and work with test and implementation engineers to review test plans, defects, test reports, MOP and change tickets.

• Participate in vendor selection by providing technical requirements into RFP document and by doing technical evaluation including Technical Proof of Concept testing.

• Steer network elements' feature roadmap by working closely with our strategic technology partners for software release planning, budget submissions and provide inputs for business case preparation.

• Drive platform improvements, enable automation and implement new solutions that enable DevOps capabilities and support business strategy of building once and deploy multiple time., Looking to be part of non-stop innovation? Join our Group Communications and Infrastructure team and you'll work alongside experts in broadband, telephony, mobile, cloud and infrastructure. We're the team that designs, builds, supports and maintains the telecoms networks across the whole Sky Group. Together, we help Sky broadband, mobile and TV enter new markets by creating a single and secure infrastructure for the amazing content and services that keep our customers coming back for more.

Proven ability to translate complex business and technical requirements into clear, implementable network designs, explicitly documenting assumptions, constraints, trade-offs, and justifying design decisions against alternatives.

• High-quality Design Documentation & Technical Authority

Strong technical documentation skills, producing high-quality HLDs using Confluence or similar wiki-based tooling, and acting as a technical authority-constructively challenging sub-optimal designs and influencing design decisions.

• ISP Subscriber & BNG Expertise

Deep experience with ISP subscriber technologies including IPoE (DHCPv4/DHCPv6), PPPoE, L2TP, RADIUS, and stateful/stateless BNG redundancy models.

• Core IP/MPLS & VPN Architecture Design

Deep understanding of telco network architectures with proven experience designing IP/MPLS networks using IS-IS, Segment Routing, MP-BGP, LDP, advanced HQoS, and Layer 2/3 VPN technologies including EVPN, T-LDP, VPLS, and IPv6.

• Automation & Configuration Management

Solid understanding of Python, Ansible, and Git-based configuration management, with the ability to design scalable, repeatable automation to support network deployment and change.

• Telemetry & Operational Assurance

Experience defining telemetry requirements and KPIs to support operational assurance, fault investigation, and capacity planning across metro and core networks.

• Packet-level Network Behaviour

Strong understanding of packet-level behaviour, including TCP/UDP, MTU and PMTUD, and encapsulation/overhead impacts across access and core networks; able to interpret relevant standards (e.g. RFCs) and validate behaviour through packet-level inspection.

• End-to-End Technical Ownership

Ability to own technical solutions end-to-end, including software/hardware selection, bug scrubs, security vulnerability assessment, and collaboration with test and implementation teams on test plans, defects, test reports, MOPs, and change tickets.

Good to have skills

• Practical experience with OpenConfig and vendor-specific NETCONF/YANG, including JSON/XML payloads.

• Strong understanding of IPv4aaS, particularly MAP-T.

• Strong understanding of BNG from Nokia (7750) and/or Huawei (CX600/NE8000).

• Good understanding of Cisco IOS-XR product line such as 8000, ASR9K and NCS5K.

• Experience contributing to and/or owning network standards.

Working in Tech, Product or Data at Sky is about building the next and the new. From broadband to broadcast, streaming to mobile, SkyQ to Sky Glass, we never stand still. We optimise and innovate., Brick Lane, is in the heart of the East End of London. It's part of a vibrant and diverse community; close to street food, cafes and shops. The closest tube station is Aldgate East and Liverpool Street is about a 10 minute walk. We'd love to hear from you Inventive, forward-thinking minds come together to work in Tech, Product and Data at Sky. It's a place where you can explore what if, how far, and what next. But better doesn't stop at what we do, it's how we do it, too. We embrace each other's differences. We support our community and contribute to a sustainable future for our business and the planet. If you believe in better, we'll back you all the way.