Performance Test Engineer

Senior Performance Test Engineer (NFT) – Inside IR35

Our client is seeking an experienced Senior Performance Test Analyst to join a high-profile programme, focusing on ensuring the performance, scalability, and reliability of critical web applications and APIs.

This is a hands‑on role suited to a seasoned performance engineer with a strong background in designing and executing performance testing strategies across complex distributed systems.

• Design, develop, and execute performance, load, stress, and endurance tests
• Analyse system performance and identify bottlenecks such as slow response times, high resource utilisation and scalability constraints
• Collaborate with developers, architects, and delivery teams to define performance test strategies and benchmarks
• Develop and maintain automated performance test frameworks and scripts
• Analyse results and provide clear, actionable optimisation recommendations
• Support continuous improvement by embedding performance testing into CI/CD pipelines
• Provide guidance and mentoring on performance testing best practices

• Extensive experience with performance testing tools such as Neo Load, Load Runner, JMeter
• Strong expertise using monitoring/observability tools (
  Dynatrace = highly desirable
  )
• Solid understanding of web technologies (HTTP/HTTPS, REST APIs), performance tuning and optimisation techniques
• Experience working in cloud environments (Azure or AWS)
• Knowledge of containerisation (Docker, Kubernetes)
• Proficiency in scripting (e.g.
  Python, Java, or Groovy
  )
• Proven track record testing high-volume, distributed systems
• Experience with Foundry testing and chaos testing
• Service virtualisation tools (e.g.
  Parasoft Virtualize, Wiremock
  )
• Experience in complex enterprise or regulated environments

If you have the relevant skills & experience, please apply promptly to be considered.