Senior Performance Tester - Non-functional - 3 month contract - paying £550 Inside IR35 - Hybrid (2 days a week)We''re looking for an experienced Senior Performance Tester to join a high-performing team working on a global streaming platform that powers millions of users across video-on-demand and live services.What you''ll do:Develop and maintain a Gatling-based performance testing framework integrated into CI/CD pipelines.Define non-functional requirements and performance acceptance criteria.Analyze performance test results and production metrics to identify trends, risks, and improvements.Work with modern technologies including Docker, Kubernetes, Kafka, and NoSQL databases.Mentor junior testers and drive continuous improvement in performance testing practices.What we''re looking for:5+ years'' experience in non-functional/performance testing for large-scale applications.Hands-on experience with Gatling and open-source performance tools.Strong knowledge of CI/CD tools (Jenkins, GitHub Actions, Gradle/Maven).Skilled in monitoring/logging with Prometheus and Grafana.Proficiency in Scripting languages (Scala, Python, Shell).This role offers the chance to make an impact on a global platform, work with cutting-edge tech, and collaborate with a talented cross-functional team.