Experis UK
Performance Tester - CGEMJP00350528
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Performance Tester
Rate: £300 - £365
Clearance required: BPSS + DV (SC issued in last 5 years / willingness to go for DV (DV Preferred)
Nationality requirement: UK passport holder only
Location: London
Work type: Hybrid - Able to work 3 days per week on site.
Security Cleared
- software testing
- test management
- test scripts
- agile methodology
- performance tests
- Apache JMeter
- Microsoft Visual Studio
- Atlassian Jira
- Atlassian Confluence
Role Overview
We are seeking an experienced Performance Tester to define and deliver the non-functional test approach for a complex, highly customised SharePoint Subscription Edition (SE) platform and its supporting AWS-hosted infrastructure.
The role will be responsible for developing realistic performance test scenarios, establishing baselines across application, database, infrastructure and integration layers, and executing load, stress, scalability and resilience testing to validate platform performance under expected and peak conditions.
This is a hands-on delivery role requiring strong analytical capability, close collaboration with architects, engineers and the Test Manager, and the ability to turn performance findings into clear recommendations that support technical governance, operational readiness and go/no-go decisions.
Performance Test Strategy & Planning
- Define the performance testing approach for the SharePoint Subscription Edition platform and its supporting AWS infrastructure
- Develop performance test scenarios covering expected user activity, document operations, search behaviour, integration traffic and core business workflows
- Agree scope, entry criteria, assumptions and success measures for performance proving activities across delivery stages
- Ensure performance testing aligns with programme priorities, environment constraints and non-functional requirements
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Performance Test Execution
- Execute load, stress, scalability and resilience testing to confirm the platform can operate within agreed performance and capacity expectations
- Use performance testing tools to simulate realistic workload patterns, transaction volumes and concurrent user behaviour
- Support performance validation during environment proving, migration activities, cutover rehearsals and production transition
- Maintain high-quality performance test artefacts, evidence packs and execution records
Core Experience
Required Skills & Experience
- Proven experience in performance testing on complex enterprise platforms, ideally within SharePoint, collaboration platforms or similarly integrated environments
- Experience designing and executing load, stress, scalability and resilience tests across application, infrastructure, database and integration layers
- Strong understanding of performance bottleneck analysis, baseline establishment and tuning recommendations
- Experience working in multi-supplier or large programme delivery environments with close collaboration across test, engineering and architecture teams
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Technical Skills & Tools
- Hands-on experience with performance and test tooling such as NeoLoad, JMeter and Visual Studio
- Working knowledge of.NET / C# and basic SQL to support scripting, data validation and analysis activities
- Experience using Jira, Confluence and GitLab to manage test activity, documentation, defects and change control
- Useful additional experience with Selenium, Cypress, Playwright, RestAssured and Postman
Desirable
- ISTQB certification and/or relevant AWS certification
- Familiarity with AWS-hosted environments, SQL Server, network and storage considerations, and integrated enterprise platforms
- Strong communication skills with the ability to present performance findings, risks and recommendations clearly to technical and delivery stakeholders
'This role requires additional vetting, which means this could take longer than our normal onboarding process. You will require additional vetting for this position, which means the process can take longer than the usual onboarding process with Capgemini. Please do not hesitate to get in touch if you have any queries.'
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