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Grid Dynamics • Belgrade, Central Serbia, Serbia
Role & seniority: Senior / Staff Performance QA Engineer (Belgrade or Novi Sad)
Performance testing: K6, JMeter, Gatling, Locust, LoadRunner (code-based tools preferred)
Observability (nice-to-have): Prometheus/Grafana, Elastic
CI/CD: integration into pipelines; TeamCity, GitHub Actions (nice-to-have)
Languages: Java, Python, JavaScript/TypeScript, or Go
Platforms: distributed systems, cloud-native/containerized environments (Docker, Kubernetes, AWS/GCP/Azure) (nice-to-have)
Design, develop, and maintain automated performance test suites for complex distributed systems
Identify bottlenecks, perform root-cause analysis, and work with engineering to remediate
Produce clear performance reports and define SLAs/workload models; integrate tests into CI/CD
5+ years in performance testing/engineering
Strong hands-on with at least one major tool (K6/JMeter/Gatling/Locust/LoadRunner)
Solid Git and programming/scripting skills (Java, Python, JavaScript/TypeScript, or Go)
Deep understanding of distributed systems, APIs, databases, caching, networking
Ability to analyze metrics, identify bottlenecks, and communicate findings
Experience testing high-traffic or mission-critical systems
Professional English (written and verbal)
Observability platforms (Prometheus/Grafana, Elastic)
Cloud-native/containerized environments (Docker, Kubernetes, A
We are looking for a Senior / Staff Performance QA Engineer to join our team in Belgrade or Novi Sad. In this role, you will help ensure the scalability, stability, and reliability of a complex cloud-based platform focused on centralized product management, usage-based billing, and AI consumption insights. You will work on performance testing and in-depth analysis of distributed systems, partnering closely with engineering teams to identify bottlenecks and drive system improvements.
Responsibilities Design, develop, and maintain automated performance test suites for complex distributed systems Identify system bottlenecks, perform root-cause analysis, and collaborate with engineering teams on remediation strategies Produce clear, actionable performance reports for technical and non-technical stakeholders Partner with cross-functional teams to define SLAs, performance criteria, and workload models Design and enhance frameworks for performance test execution, results collection, analysis, visualization, and reporting Integrate performance testing into CI/CD pipelines
Minimum Requirements 5+ years of experience in performance testing or performance engineering Strong hands-on experience with at least one major performance testing tool (K6, JMeter, Gatling, Locust, LoadRunner), code-based tools preferred Strong Git knowledge Solid programming or scripting skills in Java, Python, JavaScript/TypeScript, or Go Deep understanding of distributed systems, API performance, databases, caching, and networking fundamentals Proven ability to analyze performance metrics, identify bottlenecks, and recommend improvements Experience testing high-traffic or mission-critical systems Strong analytical mindset and clear communication skills Professional-level English (written and verbal)
Would Be a Plus Experience with observability platforms (Prometheus/Grafana, Elastic) Experience with containerized and cloud-native environments (Docker, Kubernetes, AWS/GCP/Azure) Familiarity with event-driven systems, streaming platforms (Kafka), and microservice architectures Experience with CI/CD automation tools (TeamCity, GitHub Actions, etc.)
We offer Opportunity to work on bleeding-edge projects Work with a highly motivated and dedicated team Competitive salary Flexible schedule Benefits package - medical insurance, sports Corporate social events Professional development opportunities Well-equipped office