Salary: £54,000 - 57,000 per year Requirements: Proven experience in performance and load testing Strong knowledge of tools such as JMeter, LoadRunner, or similar Experience working within secure/government environments Active SC Clearance (essential) Ability to work onsite in London 2 days per week Government experience is essential Responsibilities: Lead performance and load testing strategies Design, develop, and execute automated performance test scripts Analyse system behaviour under stress and identify bottlenecks Collaborate with developers and DevOps teams to optimise system performance Provide clear reporting and actionable insights to stakeholders Technologies: DevOps JMeter More: We are looking for a SC Cleared Senior QA Tester (Performance/Load) to join our dynamic team in London, working on mission-critical systems. We value high-impact and secure digital solutions and offer competitive daily rates of £450-£475 (Outside IR35). You will have the opportunity to work with a talented group, dedicated to optimizing system performance and driving best practices in testing. last updated 12 week of 2026