Performance Testing Expert Architect

1 day ago

Athens, Attica, Greece XM Full time

Performance Testing Expert Architect

The Role:

We are looking for a Performance Testing Expert Architect 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 primarily a technical, individual contributor role, there may be opportunities to mentor and guide junior 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 junior 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

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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