Senior Performance Test Engineer (k6)
Posted Updated 9
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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
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Skills
As published by lever · 8 questions · 1 written answer
Basics
Which location are you applying for?, Resume/CV, Full name, Email, Phone, Current location, Current company, LinkedIn URL, GitHub URL, Portfolio URL, Other website
Short answers (2)
- City of residence
- What are your annual gross salary expectations (in EURO)?
Pick from a list (5)
- Are you legally authorized to work permanently in the location of this position?
- How did you find about the position? optional
- Have you completed your military obligations?
- What is the highest level of education you have completed? optional
- Do you have any experience in People Management? optional
Written answers (1)
- Do you have any professional experience with k6? Additionally, which performance testing tools have you worked with? optional