We are looking for a highly skilled **Lead Performance Testing Engineer** to oversee, enhance, and drive performance testing strategies for scalable, high\-performance systems at an organizational level. In this role, you will lead the development and optimization of performance testing frameworks, play a pivotal role in identifying and resolving system bottlenecks, and collaborate with leadership and cross\-functional teams to ensure our technology exceeds reliability, scalability, and performance expectations. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi\-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting\-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential. **Responsibilities** * Define, drive, and continuously improve performance testing strategies, frameworks, and organizational plans with technical and strategic expertise * Oversee and conduct complex performance, load, stress, and endurance testing efforts for enterprise\-level web applications and backend APIs * Design realistic and advanced workload models reflecting intricate architecture and large\-scale production usage patterns * Lead deep\-dive analysis and interpretation of performance test results using advanced tools like k6 and sitespeed.io, pinpointing key optimization opportunities * Direct the identification and resolution of multi\-layered performance bottlenecks across application, infrastructure, database, and network systems * Oversee the integration of sophisticated performance test suites into CI/CD pipelines to guarantee system scalability and reliability * Implement advanced metric collection and visualization using Grafana and InfluxDB for detailed trend analysis and executive\-level reporting * Ensure detailed monitoring of system resource utilization (CPU, memory, disk, network) during tests while addressing misconfigurations with tailored solutions * Enhance automation workflows for performance testing, execution, and reporting by utilizing advanced scripting or programming techniques in TypeScript or PowerShell * Collaborate closely with senior stakeholders and other leads to proactively mitigate performance risks and strategize system improvement solutions * Lead scalable performance tuning initiatives and ensure systems consistently meet SLA, scalability, and reliability benchmarks * Actively mentor, coach, and lead team members by fostering an organizational culture of excellence and a performance\-focused mindset **Requirements** * Proven experience of 5\+ years in performance testing and optimization of complex web applications, APIs, and backend services * 1\+ years of experience leading and mentoring teams, fostering a high\-performance culture, and driving skills development within organizations * Comprehensive knowledge of performance testing methodologies and enterprise\-level best practices * Extensive hands\-on expertise with performance tools like k6, with strong familiarity or expertise in sitespeed.io * Deep proficiency in analyzing complex test outcomes, leveraging key metrics such as percentiles, distributions, and system resource insights * Proven experience using Grafana and InfluxDB to develop advanced monitoring and reporting solutions * Strong expertise in SQL, with capabilities in analyzing and optimizing complex queries for performance improvement * Expertise in systematically identifying and resolving bottlenecks in application, network, OS, and database layers for large\-scale systems * In\-depth understanding of infrastructure, load balancing patterns, and advanced system monitoring tools for enterprise environments * Advanced scripting and programming skills (e.g., TypeScript, PowerShell), with a focus on extending custom performance testing automation * Strong experience integrating robust test strategies into CI/CD workflows with automated reporting and notification pipelines * Excellent communication skills in business English (B2\+ level or higher), with an ability to convey technical insights to senior leadership and non\-technical audiences **Nice to have** * Proven experience using Prometheus for advanced performance monitoring and proactive alerting * Expertise in performance testing and optimization for both REST and SOAP\-based service architectures * Strong hands\-on expertise with sitespeed.io for enterprise\-level performance insights and reporting **We offer** * Connectivity Bonus (25,000 ARS are paid with a salary receipt at the end of each month as a non\-wages concept). * Medicina Prepaga (It covers the collaborator and direct family group). * Paternity Leave (Two additional days are added to what is established by law, total of 4 days). * Discounts card. * English Training (English lessons, twice per week). * Training Program (Access to multiple customized training plans according to the needs of each role within the company). * Marriage bonus (The company doubles the allowance established by law that ANSES offers). * Referral Program (Referral bonus is paid when the referral of a collaborator joins the Company). * External Agreements and Discounts. * Vacations: 14 calendar days a year *By applying to our role, you are agreeing that your personal data may be used as in set out in EPAM´s Privacy Notice and Policy.*