VodafoneThree - Quality E2E & Core Performance Lead

Vodafone; Greater London; Hybrid; GBP 60,000 - 90,000; Full time

Benefits offered by this job

Great pay

Bonuses

28 days + bank holidays

Charity time off

Pension plan

Employee discounts

Learning tools access

Job summary

VodafoneThree in the UK Networks team is seeking a mobile core network expert to join the NQCXI department. You will analyse complex performance data to improve end-to-end network behaviour and turn insights into action, while mentoring junior analysts and collaborating across functions.

You’ll focus on core network architecture, performance monitoring and benchmarking, delivering regular reports that support marketing claims and customer experience improvements.

Qualifications

• Deep understanding of Core network architecture and performance monitoring.
• In-depth knowledge of 2G/3G/4G/5G NR with focus on IMS, MMEs and GiLAN chains.
• Expertise in mobile core optimisation techniques such as TCP optimisation and traffic shaping.
• Knowledge of KPIs like CSSR, DCR, throughput, latency and rNPS.
• Ability to translate complex models into clear narratives for technical and non-technical audiences.
• Experience mentoring technical teams and reporting groups in analytics best practices.
• Strong stakeholder engagement and cross-functional collaboration skills.

Responsibilities

• Act as SME on mobile performance within NQCXI, enabling prioritisation of actions to improve customer experience and marketing claims.
• Represent NQCXI in Networks engineering forums and provide impact analysis of Core activities.
• Lead analysis and provide insights into mobile core performance deviations and benchmarking results.
• Conduct end-to-end trace analysis of critical issues to identify root causes and drive resolution.
• Provide regular mobile core network performance reporting to the wider Networks department.
• Offer technical leadership and mentorship to junior analysts and reporting teams.
• Support mobile network benchmarking and supplier performance initiatives with an end-to-end lens.

Skills

Core network architecture

Mobile performance

TCP optimisation

Performance KPIs

Stakeholder engagement

Mentoring

End-to-end tracing

Job description

Location: London OR Newbury + Hybrid

Salary: Excellent basic salary plus bonus and Vodafone benefits

Working Hours: Full time 37.5 hours per week - Monday to Friday

We believe that through collaboration and connection with our colleagues we can achieve great things. Our hybrid working approach allows our people to work both in the office and at home, providing the flexibility and resources you need to succeed in your role. We don't require you to be in on specific days; instead, we ask people to come into the office 2-3 days each week, for at least 8 days per month. You should work with your line manager to understand what their expectations are for you, your specific role and your team.

Who We Are

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.

What you'll do

We're creating something special. We are joining forces to create the biggest mobile network provider in the UK. Through our collective strengths and talents, we will transform customers' experience and create a best-in-class network for coverage, connectivity, and reliability, delivering greater value and more choice for the nation than ever before.

There are very few moments in our careers where we can feel the ground shifting beneath us, where we can sense that something bigger than we've known before is taking shape. We're not just building a company. We're going to build a culture, a legacy and a future to be proud of. This will require remarkable leadership and together we can set the standard in the industry and beyond for both customer and employee experience, in what it is a career-defining opportunity.

This is a role within Mobile Network Quality function, ensuring mobile core network performance trends are improving, delivering positive customer experience and enabling benchmarking marketing claims. It drives root cause analysis of the most critical E2E customer issues. It requires strong technical insight and analytical capability. It assures stakeholder confidence through regular core performance reporting.

• Act as the subject matter expert on mobile performance, specialized in core aspect of it, within NQCXI department, enabling effective prioritization of wider Networks department actions to improve customer experience (rNPS) and achieve marketing claims (UK’s Best Network, etc.)
• Represent NQCXI department in Networks engineering forums, building strong relationships, to provide timely information to NQCXI team on ongoing Core activities, and to provide impact analysis of said Core activities to everyone.
• Lead the analysis and provide regular insights into mobile core network performance deviations that impact customer experience and mobile network benchmarking results
• Conduct E2E trace analysis of critical customer and network issues to identify root causes and drive resolution.
• Provide regular mobile core network performance reporting to the wider Networks department
• Provide technical leadership and mentoring to junior analysts and mobile performance reporting teams within wider NQCXI department, fostering a culture of innovation and accountability.
• Support mobile network benchmarking and supplier performance initiatives with an end-to-end lens.

Who You Are

This role demands a mobile core network expert who can analyse complex performance data, optimise end-to-end network behaviour, and turn technical insights into clear, actionable guidance. The successful candidate will support informed decision-making across the business while mentoring teams and strengthening cross-functional collaboration.

• Deep understanding of Core network architecture and performance monitoring
• In-depth understanding of mobile network technologies, including 2G (GSM), 3G (UMTS), 4G (LTE), and 5G NR, with a focus on mobile core network architecture (IMS, MMEs, GiLAN chains...) and performance characteristics.
• Expertise in mobile core optimisation techniques, such as TCP Optimisation techniques, traffic shaping, etc.
• Knowledge of key mobile performance KPIs, such as call setup success rate (CSSR), drop call rate (DCR), throughput, latency, and coverage metrics, and how they correlate with customer experience indicators like rNPS.
• Ability to translate complex technical models and performance insights into clear, compelling narratives, tailored for both technical and non-technical audiences, enabling effective decision-making across the business.
• Experience mentoring technical teams, with the ability to guide junior analysts and reporting teams in analytical best practices, model development, and performance interpretation.
• Strong stakeholder engagement and cross-functional collaboration skills.

What we offer

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 (https://careers.vodafone.com/uk/applying-to-us/) 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.

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