CGI

Job Vacancy Performance Tester

United Kingdom

CGI

Women in Tech partner

Job position

Permanent
As soon as possible
United Kingdom
Published on 03/07/2026

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At CGI, you'll help ensure the performance, resilience and scalability of one of the world's leading English language assessment platforms. Joining an established team supporting an important evolving language testing system used by tens of thousands of people, you'll contribute to delivering high-quality performance testing that enables exceptional user experiences. This role offers an excellent opportunity to build on your existing technical skills and develop your expertise in performance testing and test automation within a collaborative environment that encourages innovation, ownership and continuous professional growth. Working alongside experienced colleagues, you'll play a meaningful role in delivering solutions that make a real impact for our clients.

CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK ‘Best Employer’ by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you’ll be part of an open, friendly community of experts. We’ll train and support you in taking your career wherever you want it to go.

Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This is a hybrid position.



 

Candidate profile

In this role, you will join an established CGI team delivering performance testing services for the developing the platform. CGI has successfully supported this programme for the past 18 months, and you'll work alongside an experienced Senior Performance Tester to help ensure the solution performs reliably under varying levels of demand. You'll review and develop performance test data, design and execute testing scenarios, analyse results and work with delivery teams to identify opportunities to improve system performance.

This is an excellent opportunity for someone with the relevant technical background who is looking to transition into performance testing and test automation. You'll be supported by experienced colleagues while taking ownership of your work, developing new skills and contributing to the continued success of a collaborative UK-wide team that primarily works remotely using Microsoft Teams.

Key responsibilities:

• Develop & Execute load, stress and performance test scenarios using industry-standard tools.

• Review & Create realistic performance test data and workload models.

• Analyse & Report performance test results, identifying bottlenecks and recommending improvements.

• Collaborate & Support developers, testers and project stakeholders to resolve performance issues.

• Build & Maintain performance test assets using modern automation tools and frameworks.

• Contribute & Improve testing processes, documentation and best practices across the programme.

Required qualifications to be successful in this role

We're looking for someone with a solid technical foundation who is eager to develop a career in performance testing and test automation. You should be comfortable working in collaborative Agile environments, have strong analytical skills and enjoy solving technical challenges. Experience with cloud technologies and modern testing tools will help you succeed in this role.

Essential qualifications:

• Experience with Python.

• Working knowledge of AWS and SQL.

• Experience using JMeter for performance testing.

• Experience with Postman for API testing.

• Exposure to BlazeMeter and/or Taurus.

• Familiarity with JIRA, Miro and Microsoft Teams.

• Strong analytical, troubleshooting and problem-solving skills.

• Excellent communication and collaboration skills.

• Ability to work effectively as part of a distributed team.

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Working environment

Together, as owners, let’s turn meaningful insights into action.



Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…



You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.



Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.



You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.



That same commitment to fairness extends to how we use technology. To support our recruitment team, AI tools may be used to help assess applications though they never replace human judgement. All hiring decisions remain entirely in the hands of our recruitment professionals.



Come join our team—one of the largest IT and business consulting services firms in the world.
London, England, United Kingdom
> 1000 employees
IT services
We are a global business with 91,500 professionals across hundreds of locations worldwide, providing end-to-end IT and business process services that drive our clients’ businesses. In the UK alone, we have around 6,000 member-partners working across 19 towns and cities, doing everything from writing complex code to designing sophisticated software solutions. The work we do powers some of the most ambitious projects that touch the lives of many. Our approach sets us apart, characterised by our proximity model, international presence, expertise, and operational excellence. We organise our operations within metro markets where our clients have concentrated footprints, empowering our local teams to build trusted, in-person relationships. As you build your career here, you’ll develop your skills, share your insights, and work side-by-side with colleagues and clients on innovative solutions that address the most complex issues. Our commitment to ownership, flexibility, and being approachable makes us easy to do business with. Join us, and together, as owners, let’s turn meaningful insights into action to meet the needs and balance the interests of our clients, shareholders, communities, and each other. Benefits: - Insurance coverage - Medical benefits - Pension plan - Member Assistant Programme - Check4Cancer - Flexible time off - Share Purchase Plan - Member discounts - Dental benefits - Vision benefits - Profit Participation Plan - Health and Wellbeing Programme

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Performance Tester

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