VodafoneThree - Senior Design Engineer Telco Application

• You’ll take ownership of Telco Application Services, helping to deliver solutions that align with architectural principles and business objectives.
• You’ll provide technical guidance to systems integrators, suppliers, and project teams, ensuring solution designs achieve the required business outcomes.
• You’ll contribute to the definition and refinement of technical requirements and specifications.
• You’ll ensure solutions are delivered in line with agreed functional requirements and operational expectations.
• You’ll design and specify network functions that support end-to-end services and operational needs.
• You’ll support programme and project delivery by contributing to planning activities, risk management, issue resolution, and implementation milestones.
• You’ll work alongside Technical Design Authorities and domain leaders to help shape and prioritise the technical and investment roadmap.
• You’ll monitor, analyse, and improve platform performance, capacity, resilience, and operational efficiency.
• You’ll build strong, trusted partnerships across suppliers, systems integrators, cloud providers, and internal teams.
• You’ll collaborate with technology partners including AWS, Azure, Google Cloud, Tech Mahindra, TCS, Capgemini, Sogeti, and leading telecommunications vendors to deliver critical programmes and projects.
• You’ll drive continuous improvement initiatives, identifying opportunities to enhance reliability, performance, customer experience, and cost effectiveness.
• You’ll support the adoption of modern cloud and cloud-native technologies, helping to evolve network functions and application hosting approaches.

• You’ll bring strong hands-on technical expertise and subject matter knowledge within Telco Applications or Core Network technologies.
• You’ll have experience working effectively within cross-functional teams and influencing outcomes through collaboration and expertise.
• You’ll be comfortable making informed decisions, solving complex problems, and balancing technical and business priorities.
• You’ll be adaptable, resilient, and able to thrive in a fast-changing technology environment.
• You’ll demonstrate curiosity, a growth mindset, and a genuine commitment to continuous learning and self-development.
• You’ll be open to feedback, new perspectives, and opportunities to expand your technical capabilities.
• You’ll have a strong understanding of customer-focused technology delivery and operational excellence.
• You’ll possess in-depth knowledge of 3G, 4G and 5G Core Network architectures and their application in voice, data, and messaging services.
• You’ll have hands-on experience with some of the following technologies and platforms: SMSC, MMSC, Steering of Roaming, OTA, OCS, GMLC, ES, CBC, Voicemail, NCC and SIG.
• You’ll have strong knowledge of Diameter interfaces including Gx, Gy, Sy and Sd.
• You’ll understand VoLTE and VoWiFi architectures, signalling, and call flows.
• You’ll have experience working with cloud technologies, including NFVi, Kubernetes and Software Defined infrastructure environments.
• You’ll understand cloud-native principles and deployment approaches across on-premises, off-premises and hybrid environments.
• You’ll be confident building productive relationships with suppliers, partners, and stakeholders at all levels.
• You’ll be motivated by delivering measurable outcomes, driving innovation, and creating positive customer experiences.
• You’ll be someone who values inclusion, collaboration, operational excellence, and continuous improvement.

We care about our people’s success by offering great pay, bonuses, up to 28 days off plus bank holidays, and paid time for charity work. You can personalise our benefits for you and your family, like discounts, vouchers, a pension plan and loads more. We help with your career through our amazing learning tools and top-notch parental leave policies.

Need to Know

We are regulated by the Financial Conduct Authority and all offers of employment for this role are subject to background checks, including criminal (DBS) and financial checks to meet the regulators standards.

If you require any reasonable adjustments or have an accessibility request as part of your recruitment journey, for example, extended time or breaks in between online assessments, a sign language interpreter, or assistive technology, please refer to the Accessibility section of our Careers website ( ) for guidance.

We use AI in different parts of our business to boost innovation, improve efficiency, and create new opportunities. We know many candidates use AI to fine-tune their CVs or prepare for interviews, but what we really care about is your unique experiences and achievements.

During the interview, we want you to rely on your own knowledge and skills to show us who you really are-your personality, creativity, and abilities. Above all, we’re looking for authenticity and can’t wait to get to know the real you.

We’re here to build a network the UK can count on - one that connects people, places and potential. Because no matter where you live, what your background is, or how you get online - we think everyone deserves the same chance to stay connected, and with VodafoneThree, that future’s being built - today.

We’re creating more than the UK’s best network. We’re helping close the digital divide, empower communities and drive meaningful progress.

We believe that everyone should feel they belong. Whoever you are and whatever your story, there’s space for you here. We’re building a workplace where different perspectives are welcomed, voices are heard, and everyone feels safe to show up as themselves.

You’ll join a team that genuinely cares - about each other, about our customers, and about the future we’re building. From day one, you’ll be welcomed, valued and encouraged to bring your whole self to work.

Why VodafoneThree

Join us and you’ll be at the heart of change. That means building responsibly, investing sustainably and creating opportunities that last.

We’re not just expanding connectivity; we’re reimagining what a connected nation looks like. With £11bn invested in 5G and digital infrastructure, your work will directly power businesses, services, and communities across the country.

You’ll work on real challenges, with real impact, across every corner of the country. Wherever you join us, whatever your role, you’ll be helping to build a future that works better for everyone.

We move at pace, because what we’re building matters - and we’re learning as we go. We’re proud of the progress we’ve made, but we’re just getting started.

Join our UK Networks team, where we’re continually building and enhancing our network, connecting millions of people and businesses across the country. Be part of the team that makes it all happen - simplifying, automating, and bringing better connectivity than ever before, with giga-fast speed, to our customers.