Senior Performance Test Engineer (k6)

XM
Πλήρης απασχόληση
Αθήνα

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 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!

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