VodafoneThree - SRE III

Location: The Speechmark, London + Hybrid

Salary: Excellent basic salary plus bonus and Vodafone benefits

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

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 IT teams, which is at the core of our digital future, analysing and operating all our internal and customer-facing systems, with the aim of delivering the best customer experience. None of it would be possible without our innovative teams, creating a connected future with technologies like Cloud, AI and big data.

What You’ll Do

In this role, within VodafoneThree's Performance and Chaos Engineering (PaCE) team, you will play a key role in enabling engineering teams to deliver scalable, resilient, and high-performing digital services. PaCE is responsible for embedding performance, resilience, and reliability practices throughout the software development lifecycle, helping teams identify and address risks early and build confidence in their solutions before they reach production. Working closely with product, platform, development, and Site Reliability Engineering teams, you will champion a shift-left approach to performance and resilience engineering. Your focus will be on providing the frameworks, tooling, standards, and automation that enable teams to validate scalability, reliability, and operational readiness from the earliest stages of design and development. Your expertise in software engineering, performance testing, observability, and automation will help drive the adoption of engineering best practices across the organisation. You will lead initiatives to integrate performance and resilience validation into CI/CD pipelines, establish meaningful service level objectives (SLOs), and develop self-service capabilities that empower teams to identify bottlenecks, validate system behaviour under load, and assess failure scenarios independently. Through collaboration, coaching, and continuous improvement, you will help cultivate a culture where performance, resilience, and operational excellence are shared responsibilities. By leveraging data-driven insights, experimentation, and automation, you will enable teams to deliver services that are reliable, scalable, and capable of supporting VodafoneThree's evolving customer and business demands.

Main responsibilities:

• You will drive shift-left performance and resilience engineering by embedding non-functional testing, reliability, and scalability validation throughout the software development lifecycle.
• You will integrate automated performance and resilience validation into CI/CD pipelines, ensuring risks are identified and addressed before production deployment.
• Be part of enabling engineering teams through self-service capabilities, providing tooling, frameworks, standards, and guidance for performance, resilience, and chaos testing.
• Support in defining and championing engineering best practices, including SLOs, observability, capacity planning, and operational readiness to improve service reliability and customer experience.
• You will collaborate closely with Product, Engineering, Platform, Architecture, and SRE teams to design resilient, scalable solutions and proactively identify performance and reliability risks.
• Drive continuous improvement through data-driven insights, experimentation, and chaos engineering, helping teams build confidence in system behaviour under load and failure conditions.
• Alongside the team, you will shape the development of an in-house framework, used daily by hundreds of engineers across the organization.

Who You Are

You will have software development experience, knowing how to write distributed, high-performing systems using at least 1 of the following programming languages: Python, React, Node.js, Java or Scala. You will have experience with cloud computing, specifically AWS or Azure, and Infrastructure as Code (Terraform and/or CloudFormation). You will use your experience of observability tools and service level objectives to monitor cloud infrastructure performance, capacity, and availability. You will have a proactive attitude to problem-solving: looking to find areas of improvement and bottlenecks. You will have working knowledge of CI/CD implementation and agile DevOps methods. You have an understanding of non-functional testing practices.

Worried that you don’t meet all the desired criteria exactly? We know that everyone is unique, with multiple aspects to their identity and different experiences behind them. We are passionate about Inclusion for All and creating a workplace where everyone can thrive, whatever their personal or professional background.

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 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.