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We are looking for a highly motivated and experienced Lead Performance Tester with deep expertise in scalability and load testing.
In this position, you will be responsible for designing, implementing, and automating solutions to thoroughly assess the performance and resilience of our platform under a variety of load scenarios, with a particular focus on store scalability and stability.
You will leverage advanced tools and methodologies to ensure our client remains at the forefront of high-performance ecommerce.
Responsibilities
Build and maintain tools for generating realistic, scalable store test scenarios for performance and load testing
Plan, execute, and analyze load tests using tools like K6 to uncover performance bottlenecks and scalability challenges, especially in store operations
Automate the collection and reporting of performance metrics to deliver clear, actionable insights and proactively detect regressions
Work closely with engineering teams to understand system architecture, pinpoint critical performance paths, and provide data-driven recommendations for optimization
Drive the continuous improvement of load testing strategies, tools, and best practices within the Platform Governance team
Thoroughly document test plans, results, and key findings
Address and resolve identified platform bottlenecks to enhance system performance
Requirements
Minimum of 5 years of hands-on experience in scalability and performance testing, including expertise in load generation, monitoring, and analysis
At least one year of experience leading and managing development teams
Direct experience with load testing tools,



particularly K6
Proficiency in at least two of the following programming languages: Go, Scala, and Typescript, and willingness to work with all three as needed
Experience with observability and monitoring tools such as OpenTelemetry, Prometheus, and ELK
Proven ability to build and maintain automation for testing, data collection, and reporting
Familiarity with cloud platforms such as Google Cloud Platform, AWS, or Azure, and experience with microservices architectures
Experience working with CI/CD pipelines for automated testing and deployment
Fluent English skills (written and spoken) at a B2+ level or higher
Nice to have
Excellent communication skills, with the ability to clearly explain complex technical concepts to both technical and non-technical audiences
Demonstrated initiative and drive, actively seeking out new challenges and solutions
Strong growth mindset, with enthusiasm for learning new technologies and adapting to changing requirements
Interest or background in the e-commerce sector, with an understanding of the unique performance needs of online retail
We offer
International projects with top brands
Work with global teams of highly skilled, diverse peers
Employee financial programs
Paid time off and sick leave
Upskilling, reskilling and certification courses
Unlimited access to the LinkedIn Learning library and 22,000+ courses
Integral career opportunities
Volunteer and community involvement opportunities
EPAM Employee Groups
Award-winning culture recognized by Glassdoor, Newsweek and LinkedIn
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Postúlate en Kit Empleo: kitempleo.com.ar/empleo/q3pd5

📌 Lead Performance Tester (Zárate)
🏢 EPAM Systems
📍 Zárate