Performance Tester

Salary: £? - ? per year

Requirements:

• We require BPSS clearance and DV clearance, or SC issued within the last 5 years with willingness to go for DV; DV is preferred.
• We require a UK passport holder only.
• We are looking for an experienced Performance Tester with proven experience on complex enterprise platforms, ideally within SharePoint, collaboration platforms, or similarly integrated environments.
• We need experience designing and executing load, stress, scalability, and resilience tests across application, infrastructure, database, and integration layers.
• We require strong understanding of performance bottleneck analysis, baseline establishment, and tuning recommendations.
• We need experience working in multi-supplier or large programme delivery environments with close collaboration across test, engineering, and architecture teams.
• We require hands-on experience with performance and test tooling such as NeoLoad, JMeter, and Visual Studio.
• We need working knowledge of .NET / C# and basic SQL to support scripting, data validation, and analysis activities.
• We require experience using Jira, Confluence, and GitLab to manage test activity, documentation, defects, and change control.
• Desirable: ISTQB certification and/or relevant AWS certification.
• Desirable: Familiarity with AWS-hosted environments, SQL Server, network and storage considerations, and integrated enterprise platforms.
• Desirable: Strong communication skills to present performance findings, risks, and recommendations clearly to technical and delivery stakeholders.

Responsibilities:

• We will define the performance testing approach for the SharePoint Subscription Edition platform and its supporting AWS infrastructure.
• We will develop performance test scenarios covering expected user activity, document operations, search behaviour, integration traffic, and core business workflows.
• We will agree scope, entry criteria, assumptions, and success measures for performance proving activities across delivery stages.
• We will ensure performance testing aligns with programme priorities, environment constraints, and non-functional requirements.
• We will execute load, stress, scalability, and resilience testing to confirm the platform can operate within agreed performance and capacity expectations.
• We will use performance testing tools to simulate realistic workload patterns, transaction volumes, and concurrent user behaviour.
• We will support performance validation during environment proving, migration activities, cutover rehearsals, and production transition.
• We will maintain high-quality performance test artefacts, evidence packs, and execution records.
• We will collaborate closely with architects, engineers, and the Test Manager, and turn performance findings into clear recommendations that support technical governance, operational readiness, and go/no-go decisions.

Technologies:

• AWS
• C#
• Confluence
• GitLab
• ISTQB
• Support
• JIRA
• JMeter
• Network
• SQL
• SharePoint
• Visual Studio
• Office 365
• ASP.NET
• Cloud
• Atlassian
• Cypress
• Playwright
• Security
• Selenium

More:

We are seeking an experienced Performance Tester for a complex, highly customised SharePoint Subscription Edition platform and its supporting AWS-hosted infrastructure. This is a hybrid role based in London, with the ability to work 3 days per week ऑन site. The rate is £300 to £365. The role requires additional vetting, so onboarding may take longer than usual. We also want candidates to be aware that suspicious outreach should be verified via the ManpowerGroup website.

last updated 31 week of 2026