Performance Tester

Salary: £43,000 - 83,000 per year

Requirements

• Strong capability in at least two performance test tools, such as LoadRunner and JMeter
• Strong technical background and capability, including good knowledge of at least one software language
• Fundamental understanding of common application technologies, such as web servers and databases
• Understanding of performance monitoring across different servers, protocols, infrastructure, counter types, and application layers
• Technologies needed: C#, .NET, TCP/IP, IIS, SQL Server, and network and server topology across web, app, and database servers
• Knowledge of service layers, RESTful services, WSDL services, and FTS

Responsibilities

• Produce Workload Analysis Documents and Performance Test Approach documents from project non-functional specifications
• Produce performance test scripts, test data, and scenarios in line with the documented approach
• Execute performance tests defined in the Workload Analysis Document and Performance Test Design
• Document any deviation from the originally defined test scenarios
• Log test results and present any extrapolation needed to indicate how the application may perform in a production environment
• Work with the Technical Lead and other resources across development and environments teams to rectify and retest issues encountered during testing
• Tune application performance
• Summarise performance testing in the Performance Test Evaluation report

Technologies

• C#
• Embedded
• Support
• JMeter
• Network
• SQL
• TCP/IP
• Web
• ASP.NET
• Security

More

We work within Business Technology Solutions (BTS), helping clients navigate large-scale, technology-driven transformation programmes and delivering outstanding results through the right people, methodology, and process. Our Managed Testing Services (MTS) delivery unit focuses on helping clients achieve business value through testing transformation, including moving from embedded testing approaches to output- and outcome-based services, bid solutioning, and pre-sales support for sector growth initiatives. This permanent Performance Tester role is based in London and is carried out across a wide variety of our sites and client locations. We offer professional development, accelerated career progression, an entrepreneurial environment, and a flexible benefits package. We also foster an inclusive culture committed to helping everyone achieve their full potential and balance work-life needs.

last updated 37 week of 2026