Performance Tester - CGEMJP00350528

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 requirementsPerformance 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 Required Skills & Experience
Core 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 teamsTechnical 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 PostmanDesirable

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.'

If you receive suspicious outreach claiming to be from us, please contact us via the ManpowerGroup website
Only candidates based in UK and eligible to work in UK are allowed