Core Voice Signalling Designer

Location: Birmingham, Leeds, London, Manchester, Peterborough, Reading.

We have a great new role for a Core Voice Signalling Designer to join our Signalling Design team. You will help design and steer designs for signalling‑related projects, directing project teams to ensure optimal delivery outcomes. You will play a key role in shaping and steering design across core voice network platforms. Reporting into the Subscriber Management and Signalling Engineering Manager, you will act as a trusted design authority within project teams to ensure solutions are robust, scalable and customer focused.

Responsibilities

In this role, you will work across a broad range of signalling technologies, contributing to both legacy and next generation network evolution. You will lead on design requirements, influence vendor outcomes, and support automated testing initiatives, all while ensuring designs meet performance, security and capacity needs across the network. You will be tasked with producing high and low level technical design documentation.

Qualifications

Must haves

• Ericsson IP STP design and configuration experience
• Ericsson DSC design and configuration experience
• Experience producing high and low level technical design documentation
• Strong working knowledge of Ericsson command structures and documentation
• Experience across cellular networks including 2G, 3G, 4G and IMS
• Proven expertise in signalling protocols such as SS7, SIGTRAN, SIP, Diameter and MAP

Other desirable skills

• Knowledge of capacity modelling and network performance considerations
• Exposure to vendor engagement, including SOR and SOW reviews
• Experience contributing to automated testing approaches within telecoms environments
• Strong collaboration and communication skills across technical and non‑technical audiences

Benefits

We know life isn’t just about work, so our benefits are built to support you in the moments that matter. You’ll get Bupa healthcare, wellbeing support, life cover, a pension and generous holiday –plus your birthday off. And there’s more. Enjoy some extra perks on us, with optional electric vehicle lease and Cycle2Work schemes, dental insurance, neurodiversity assessments, and brilliant discounts on broadband, TV and mobile. You’ll even get access to the Virgin Family platform and the O₂ Priority app, with exclusive rewards, experiences and chances to attend events at The O₂ and beyond.

Next Steps

Once you apply, the next steps might include a call with a recruiter, a video interview, an interview with the hiring manager and a task or assessment. We’ll also ask about any adjustments you might need, and we’ll do our best to make them happen. We review applications and interview throughout the advert window, so it’s worth applying sooner rather than later. If you’re offered the role, the offer will be subject to background checks, including a criminal record check and, for some roles, a financial background check.

Virgin Media O₂ is an equal opportunities employer and we work hard to remove bias and barriers.

We want every person who joins us – and everyone thinking about joining us – to feel seen, heard and supported. When you work with us, you’ll have access to our award‑winning employee network groups. These communities bring people together, champion allyship and create uplifting spaces where you can learn, share and feel part of something bigger. They play a big role in helping people feel connected from day one.