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Ten10 Logo Ten10 · IT - Software Development

Performance Test Engineering Consultant

United Kingdom, London · Job Posted December 12, 2025
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Job Description

Are you an experienced SDET with Performance Test experience looking to take the next step in your career within a dynamic and growing consultancy? At Ten10, we are looking for talented SDETs with Performance Test Engineering experience to join our highly skilled consultancy team. This is an exciting opportunity to work on diverse and challenging client projects, ensuring the delivery of high-performing applications and systems.

Job Responsibility

  • Deliver performance testing solutions to a range of clients, ensuring systems are scalable, reliable, and performant
  • Design, implement, and execute performance test strategies, including load, stress, scalability, and endurance testing
  • Work closely with technical teams and stakeholders, translating business requirements into testable solutions
  • Contribute to functional test automation (e.g., using Selenium, Cypress, Playwright) and ensure alignment between functional and non-functional testing efforts
  • Adopt a "shift-left" approach by designing and implementing performance tests at the API, component, and integration levels, not just at the UI/E2E level
  • Engage directly with clients, providing expert advice on performance test best practices
  • Collaborate with development, DevOps, and infrastructure teams to identify performance bottlenecks and optimise system performance
  • Utilise performance testing tools such as JMeter, K6, LoadRunner, NeoLoad, or Gatling
  • Provide insights and recommendations based on test results to drive continuous improvements

Requirements

  • SDET with experience as a Performance Tester, ideally in a consultancy or client-facing environment
  • Proficiency in at least one object-oriented programming language (e.g., Java, Python, C#, or JavaScript/TypeScript) for writing clean, maintainable test code and frameworks
  • Strong knowledge of performance testing methodologies, tools, and scripting
  • Ability to engage with customers, technical teams, and stakeholders to deliver meaningful outcomes
  • Experience in cloud-based and distributed system performance testing
  • A true "engineer in test" mindset: able to build custom tools, write high-quality test code, and participate in technical design and code reviews
  • Knowledge of monitoring and diagnostics tools such as AppDynamics, Dynatrace, Datadog or New Relic
  • Strong analytical and problem-solving skills, with a keen eye for detail
  • Demonstrable experience in building E2E functional automation frameworks in addition to a primary focus on performance testing
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