Senior Performance Test Engineer (k6)

Location: Limassol; Nicosia; Athens; Thessaloniki; Fully Remote - in other eligible locations Workplace: hybrid The Role:   We are looking for a Senior Performance Test Engineer 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 company Develop and maintain performance testing scripts using K6 and JavaScript/TypeScript, focusing on reusable and scalable testing approaches Execute various types of performance tests (load, stress, soak) on REST and GraphQL APIs Monitor and analyze test results using tools like Grafana and Prometheus, providing actionable recommendations Collaborate with engineering teams to identify and troubleshoot system performance bottlenecks Apply performance best practices in Spring Boot, JVM, and microservice-based environments Integrate performance tests into CI/CD pipelines (GitLab, Jenkins) to enable continuous validation May take on mentorship or leadership responsibilities over engineers within the team over time Main requirements: BSc/MSc in Computer Science, or related discipline 5+ years of hands-on experience in QA 2+ years of experience in performance testing using tools like K6 or Gatling Proficiency in JavaScript/TypeScript for writing test scripts Strong experience in API performance testing (REST, GraphQL), including rate limiting and caching strategies Familiarity with Spring Boot applications and microservices architecture Experience 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 testing JVM tuning and database performance optimization expertise Familiarity with cloud-native performance strategies and service mesh technologies (Istio, Linkerd) Exposure to distributed tracing tools like Jaeger or OpenTelemetry Experience in managing/leading a team Benefit from: Attractive remuneration package Intellectually stimulating work environment Continuous personal development and international training opportunities The Hiring Experience: What Awaits You Let’s Connect – Intro Chat with Talent Acquisition Deep Dive – First Interview with Your Future Team Final Connection – Final Interview All applications will be treated with strict confidentiality!   By submitting this application, I confirm that I have read and agree to the terms of the Privacy Policy and the Confidentiality Undertaking.