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Performance Testing Expert Architect

●

1 month ago

Greece
Full Time
Senior
Hybrid

Basic Information

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. 

Responsibilities

  • 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 

Requirements

Performance Testing
Quality Assurance
  • 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) 

Benefits

Bonus structure
Certifications and training
Continuous education
Flexi work schedule
Free snacks
Pension/Retirement plan
Private health insurance
Team building events
Work equipment (ex. phone, laptop etc)
  • Attractive remuneration package plus performance related reward  
  • Private health insurance  
  • Corporate pension fund  
  • Intellectually stimulating work environment 
  • Continuous personal development and international training opportunities 

Good to have

  • 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 

Recruitment process

  • Let’s Connect – Intro Chat with Talent Acquisition
  • Deep Dive – First Interview with Your Future Team
  • Final Connection – Final Interview
About the company

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About the company

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XM

XM

Engineering
Software Development
Quality Assurance Engineer