Senior Performance Test Engineer

The Role: We are looking for a Senior Performance Test Engineer (k6) to join our high-performing team and contribute to the performance, scalability, and reliability of our trading platforms. This role involves hands-on performance testing and analysis in a high-throughput, low-latency environment, collaborating closely with development and infrastructure teams to ensure system efficiency and stability. You will work with modern tools and practices, leveraging K6 with JavaScript/TypeScript, containerized environments (Docker, Kubernetes), and cloud-native performance strategies. While this is a technical role, there may be opportunities to mentor and guide engineers on the team as your role evolves. The main responsibilities of the position include: Define and refine performance testing strategy across the companyDevelop and maintain performance testing scripts using K6 and JavaScript/TypeScript, focusing on reusable and scalable testing approachesExecute various types of performance tests (load, stress, soak) on REST and GraphQL APIsMonitor and analyze test results using tools like Grafana and Prometheus, providing actionable recommendationsCollaborate with engineering teams to identify and troubleshoot system performance bottlenecksApply performance best practices in Spring Boot, JVM, and microservice-based environmentsIntegrate performance tests into CI/CD pipelines (GitLab, Jenkins) to enable continuous validationMay take on mentorship or leadership responsibilities over engineers within the team over time Main requirements: BSc/MSc in Computer Science, or related discipline5+ years of hands-on experience in QA2+ years of experience in performance testing using tools like K6 or GatlingProficiency in JavaScript/TypeScript for writing test scriptsStrong experience in API performance testing (REST, GraphQL), including rate limiting and caching strategiesFamiliarity with Spring Boot applications and microservices architectureExperience working in Docker/Kubernetes environments, including performance-related configurations (HPA, resource limits, etc.)Proficiency with monitoring/observability tools such as Grafana, Prometheus, etc.Experience integrating testing into CI/CD pipelines (GitLab CI, Jenkins) The following will be considered an advantage: Experience with gRPC, WebSockets, and HTTP/2 performance testingJVM tuning and database performance optimization expertiseFamiliarity with cloud-native performance strategies and service mesh technologies (Istio, Linkerd)Exposure to distributed tracing tools like Jaeger or OpenTelemetryExperience in managing/leading a team Benefit from: Attractive remuneration packageIntellectually stimulating work environmentContinuous personal development and international training opportunities The Hiring Experience: What Awaits You Let’s Connect – Intro Chat with Talent AcquisitionDeep Dive – First Interview with Your Future TeamFinal Connection – Final Interview Location: Cyprus, Greece or Fully Remote - in other eligible locations All applications will be treated with strict confidentiality!