Performance Tester

18 hours ago

Delhi, India Cozzera Full time

Position: Performance TesterExperience: 6+ YearsLocation: RemoteEmployment Type: Full-timeAbout the RoleWe are seeking an experienced Performance Tester to ensure scalability, stability, and responsiveness across our distributed applications and eCommerce systems. The ideal candidate will have a strong background in performance testing, profiling, and optimization, along with hands-on experience using leading performance testing and monitoring tools.Key Responsibilities- Design, develop, and execute performance, load, stress, and endurance tests for enterprise-scale applications.- Conduct end-to-end performance testing of eCommerce platforms including APIs, microservices, and front-end layers.- Identify performance bottlenecks and provide actionable recommendations to development and infrastructure teams.- Utilize APM tools (e.g., New Relic, Dynatrace, Grafana, Prometheus) to monitor application health and analyze system behavior.- Perform profiling and diagnostics of backend systems (JVM, Node.js, Go) to identify issues like GC pauses, thread contention, or CPU bottlenecks.- Develop and maintain performance test scripts and frameworks using JMeter, Gatling, k6, LoadRunner, BlazeMeter, or OctoPerf.- Collaborate with DevOps and Engineering teams to integrate performance tests into CI/CD pipelines using Jenkins, GitHub Actions, or GitLab CI.- Prepare detailed performance reports, test summaries, and trend analyses for stakeholders.Required Skills & Experience- 6+ years of hands-on experience in software performance testing and system profiling.- Proven experience with eCommerce application performance testing (web, API, and backend layers).- Strong expertise in one or more performance testing tools:- JMeter, Gatling, k6, LoadRunner, BlazeMeter, or OctoPerf.- Experience with APM and monitoring tools such as New Relic, Dynatrace, Grafana, Prometheus, AppDynamics, etc.- Deep understanding of application profiling for JVM, Node.js, or Go-based systems.- Proficiency in analyzing system-level metrics: CPU, memory, I/O, GC, thread dumps, and network performance.- Solid grasp of CI/CD pipelines and tools (Jenkins, GitHub Actions, GitLab CI).- Experience working in Agile/Scrum development environments.Good-to-Have Skills- Familiarity with Kubernetes, Docker, and cloud platforms (AWS/Azure/GCP).- Knowledge of APIs, microservices, and distributed architecture performance patterns.- Experience in scripting (Python, Bash, Groovy, or JavaScript) for automation and data generation.- Exposure to chaos testing or resiliency engineering tools (Gremlin, LitmusChaos).

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