Lead Performance Test Engineer

Sogeti; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Capgemini in London is seeking a Lead Performance Test Engineer to steer a team of performance engineers, defining strategy and non-functional requirements for complex client programmes.

You'll work across engineering, architecture, DevOps, SRE and cloud teams to ensure systems are scalable, resilient and production-ready, with hybrid working across offices, client sites and home. The role emphasizes strong stakeholder management, hands-on testing and shaping performance gates.

Qualifications

• Experience in enterprise performance engineering and non-functional testing.
• Proven ability to lead performance engineering teams.
• Hands-on with LoadRunner/JMeter/NeoLoad/Gatling/k6.
• Experience designing load, stress, endurance, and failover tests.
• Experience testing APIs, microservices and distributed systems.
• Familiarity with cloud-native architectures and CI/CD pipelines.
• Strong root-cause analysis and performance tuning skills.
• Excellent stakeholder communication and consulting skills.

Responsibilities

• Define the performance strategy and non-functional requirements.
• Lead and coach a team of performance engineers.
• Design and execute load, stress, and scalability tests.
• Integrate performance testing into CI/CD pipelines.
• Collaborate with architects, DevOps, SRE, and developers.
• Analyze bottlenecks and drive optimization across systems.

Skills

Performance engineering

Team leadership

CI/CD integration

Monitoring/observability

Stakeholder management

Distributed systems

Tools

LoadRunner

JMeter

NeoLoad

Gatling

k6

Job description

# Lead Performance Test Engineer Apply now## **About the job you're considering**We are seeking a Lead Performance Engineer to lead a team of performance engineers delivering assurance across complex client programmes. You will set the performance strategy, define and agree non-functional requirements and quality gates, and ensure systems are scalable, resilient and ready for production.Working with engineering, architecture, DevOps, SRE, cloud and business teams, you will embed performance engineering throughout the delivery lifecycle**Hybrid working**: The places that you work from day to day will vary according to your role, your needs, and those of the business; it will be a blend of Company offices, client sites, and your home; noting that you will be unable to work at home 100% of the time. If you are offered this position, you will go through a series of pre-employment checks, including identity, nationality (single or dual) or immigration status, employment history going back three continuous years, and unspent criminal record check (known as Disclosure and Barring Service)## **Your role**## **Mandatory skills*** Strong experience in enterprise performance engineering and non-functional testing.* Experience leading and technically directing performance engineering teams.* Hands-on expertise with performance testing tools such as LoadRunner, JMeter, NeoLoad, Gatling or k6.* Experience designing and executing load, stress, endurance, scalability, volume and failover testing.* Experience testing web applications, APIs, microservices and distributed systems.* Knowledge of cloud-native, containerised and modern application architectures.* Experience integrating performance testing within CI/CD pipelines.* Experience using monitoring, observability and telemetry tools to identify performance bottlenecks.* Strong root-cause analysis, diagnostics and performance tuning skills.* Experience defining performance requirements, workloads, test data, baselines and acceptance criteria.* Understanding of capacity planning, scalability, resilience and production readiness.* Strong stakeholder management, communication and consulting skills, with the ability to influence technical and business stakeholders.* Experience collaborating with architects, developers, DevOps, SRE, platform teams and third-party suppliers.* Ability to lead, coach and develop technical specialists while maintaining delivery quality and standards.## **Desirable Skills & Experience*** Experience with Dynatrace, AppDynamics, New Relic, Grafana, Prometheus or Azure Monitor.* Knowledge of Azure, AWS or Google Cloud Platform.* Experience with Kubernetes and Infrastructure as Code (IaC).* Understanding of Site Reliability Engineering (SRE), Service Level Objectives (SLOs) and operational resilience.* Experience working within regulated, public sector or healthcare environments.* Relevant certifications in Performance Testing, Cloud, DevOps, SRE or Observability disciplines.## **Your security clearance**To be successfully appointed to this role, it is a requirement to obtain Security Check (SC) clearance. To obtain SC clearance, the successful applicant must have resided continuously within the United Kingdom for the last 5 years, along with other criteria and requirements. Throughout the recruitment process, you will be asked questions about your security clearance eligibility such as, but not limited to, country of residence and nationality. Some posts are restricted to sole UK Nationals for security reasons; therefore, you may be asked about your citizenship in the application process.## **What does 'Get The Future You Want' mean for you?**You will be empowered to explore, innovate, and progress. You will benefit from Capgemini’s ‘learning for life’ mindset, meaning you will have countless training and development opportunities from thinktanks to hackathons, and access to 250,000 courses with numerous external certifications from AWS, Microsoft, Harvard Management or, Cybersecurity qualifications and much more. You will be encouraged to have a positive work-life balance. Our hybrid-first way of working means we embed hybrid working in all that we do and make flexible working arrangements the day-to-day reality for our people. All UK employees are eligible to request flexible working arrangements.## **Why you should consider Capgemini:**Growing clients’ businesses while building a more sustainable, more inclusive future is a tough ask. When you join Capgemini, you’ll join a thriving company and become part of a diverse collective of free-thinkers, entrepreneurs and industry experts. We find new ways technology can help us reimagine what’s possible. It’s why, together, we seek out opportunities that will transform the world’s leading businesses, and it’s how you’ll gain the experiences and connections you need to shape your future. By learning from each other every day, sharing knowledge, and always pushing yourself to do better, you’ll build the skills you want. You’ll use your skills to help our clients leverage technology to innovate and grow their business. So, it might not always be easy, but making the world a better place rarely is.## **About Capgemini:**Capgemini is a global business and technology transformation partner, helping organizations to accelerate their dual transition to a digital and sustainable world, while creating tangible impact for enterprises and society. It is a responsible and diverse group of 340,000 team members in more than 50 countries. With its strong over 55-year heritage, Capgemini is trusted by its clients to unlock the value of technology to address the entire breadth of their business needs. It delivers end-to-end services and solutions leveraging strengths from strategy and design to engineering, all fuelled by its market leading capabilities in AI, cloud and data, combined with its deep industry expertise and partner ecosystem. The Group reported 2023 global revenues of €22.5 billion.Ref. code532301-en\_GBPosted on07 Aug 2026Contract typePermanentLocationLondonBusiness unitABL Northern Central EuropeExperience levelExperienced ProfessionalsProfessional communitiesQuality Engineering & Testing